190693789225 has 9 divisors (see below), whose sum is σ = 236463006117. Its totient is φ = 152553284640.

The previous prime is 190693789217. The next prime is 190693789243. The reversal of 190693789225 is 522987396091.

The square root of 190693789225 is 436685.

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

It can be written as a sum of positive squares in 4 ways, for example, as 38908746009 + 151785043216 = 197253^2 + 389596^2 .

It is not a de Polignac number, because 190693789225 - 2³ = 190693789217 is a prime.

It is a super-2 number, since 2×190693789225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2139757 + ... + 2227093.

Almost surely, 2^190693789225 is an apocalyptic number.

190693789225 is the 436685-th square number.

190693789225 is the 218343-rd centered octagonal number.

It is an amenable number.

190693789225 is a deficient number, since it is larger than the sum of its proper divisors (45769216892).

190693789225 is an frugal number, since it uses more digits than its factorization.

190693789225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174684 (or 87342 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 61.

The spelling of 190693789225 in words is "one hundred ninety billion, six hundred ninety-three million, seven hundred eighty-nine thousand, two hundred twenty-five".