172699969 has 8 divisors (see below), whose sum is σ = 188533352. Its totient is φ = 157230720.

The previous prime is 172699963. The next prime is 172699973. The reversal of 172699969 is 969996271.

It can be written as a sum of positive squares in 4 ways, for example, as 15523600 + 157176369 = 3940^2 + 12537^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172699969 is a prime.

It is a super-2 number, since 2×172699969² = 59650558585201922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172699963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90042 + ... + 91939.

It is an arithmetic number, because the mean of its divisors is an integer number (23566669).

Almost surely, 2^172699969 is an apocalyptic number.

It is an amenable number.

172699969 is a deficient number, since it is larger than the sum of its proper divisors (15833383).

172699969 is a wasteful number, since it uses less digits than its factorization.

172699969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182067.

The product of its digits is 3306744, while the sum is 58.

The square root of 172699969 is about 13141.5360213333. The cubic root of 172699969 is about 556.8831617942.

The spelling of 172699969 in words is "one hundred seventy-two million, six hundred ninety-nine thousand, nine hundred sixty-nine".