172416429 has 6 divisors (see below), whose sum is σ = 249045966. Its totient is φ = 114944280.

The previous prime is 172416427. The next prime is 172416443. The reversal of 172416429 is 924614271.

It is a happy number.

172416429 is a `hidden beast` number, since 1 + 7 + 2 + 4 + 1 + 642 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 155002500 + 17413929 = 12450^2 + 4173^2 .

It is not a de Polignac number, because 172416429 - 2¹ = 172416427 is a prime.

It is a super-2 number, since 2×172416429² = 59454849978224082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172416393 and 172416402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172416421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9578682 + ... + 9578699.

It is an arithmetic number, because the mean of its divisors is an integer number (41507661).

Almost surely, 2^172416429 is an apocalyptic number.

It is an amenable number.

172416429 is a deficient number, since it is larger than the sum of its proper divisors (76629537).

172416429 is a wasteful number, since it uses less digits than its factorization.

172416429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19157387 (or 19157384 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 172416429 is about 13130.7436575390. The cubic root of 172416429 is about 556.5782299819.

The spelling of 172416429 in words is "one hundred seventy-two million, four hundred sixteen thousand, four hundred twenty-nine".