1901723469 has 4 divisors (see below), whose sum is σ = 2535631296. Its totient is φ = 1267815644.

The previous prime is 1901723449. The next prime is 1901723477. The reversal of 1901723469 is 9643271091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1901723469 - 2¹⁵ = 1901690701 is a prime.

It is a super-2 number, since 2×1901723469² = 7233104305090787922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1901723469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901723429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316953909 + ... + 316953914.

It is an arithmetic number, because the mean of its divisors is an integer number (633907824).

Almost surely, 2^1901723469 is an apocalyptic number.

It is an amenable number.

1901723469 is a deficient number, since it is larger than the sum of its proper divisors (633907827).

1901723469 is an equidigital number, since it uses as much as digits as its factorization.

1901723469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633907826.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 1901723469 is about 43608.7544995268. The cubic root of 1901723469 is about 1238.9367118536.

It can be divided in two parts, 19017 and 23469, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 1901723469 in words is "one billion, nine hundred one million, seven hundred twenty-three thousand, four hundred sixty-nine".