190172969 has 12 divisors (see below), whose sum is σ = 222184404. Its totient is φ = 162296064.

The previous prime is 190172963. The next prime is 190173019. The reversal of 190172969 is 969271091.

190172969 = 392² + 393² + ... + 857².

It can be written as a sum of positive squares in 2 ways, for example, as 132595225 + 57577744 = 11515^2 + 7588^2 .

It is not a de Polignac number, because 190172969 - 2⁴ = 190172953 is a prime.

It is a super-2 number, since 2×190172969² = 72331516276549922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190172963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3089 + ... + 19745.

It is an arithmetic number, because the mean of its divisors is an integer number (18515367).

Almost surely, 2^190172969 is an apocalyptic number.

It is an amenable number.

190172969 is a deficient number, since it is larger than the sum of its proper divisors (32011435).

190172969 is a wasteful number, since it uses less digits than its factorization.

190172969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16904 (or 16897 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 190172969 is about 13790.3215698547. The cubic root of 190172969 is about 575.0641077861.

The spelling of 190172969 in words is "one hundred ninety million, one hundred seventy-two thousand, nine hundred sixty-nine".