1923921573025 has 9 divisors (see below), whose sum is σ = 2385671350323. Its totient is φ = 1539131710200.

The previous prime is 1923921573023. The next prime is 1923921573073. The reversal of 1923921573025 is 5203751293291.

It is a happy number.

The square root of 1923921573025 is 1387055.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 692611766289 + 1231309806736 = 832233^2 + 1109644^2 .

It is not a de Polignac number, because 1923921573025 - 2¹ = 1923921573023 is a prime.

It is a super-3 number, since 3×1923921573025³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1923921573025.

It is not an unprimeable number, because it can be changed into a prime (1923921573023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6796570 + ... + 7073980.

Almost surely, 2^{1923921573025} is an apocalyptic number.

1923921573025 is the 1387055-th square number.

1923921573025 is the 693528-th centered octagonal number.

It is an amenable number.

1923921573025 is a deficient number, since it is larger than the sum of its proper divisors (461749777298).

1923921573025 is an frugal number, since it uses more digits than its factorization.

1923921573025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554832 (or 277416 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 49.

Multiplying 1923921573025 by its sum of digits (49), we get a square (94272157078225 = 9709385²).

The spelling of 1923921573025 in words is "one trillion, nine hundred twenty-three billion, nine hundred twenty-one million, five hundred seventy-three thousand, twenty-five".