172629961 has 8 divisors (see below), whose sum is σ = 197391744. Its totient is φ = 147893280.

The previous prime is 172629959. The next prime is 172629971. The reversal of 172629961 is 169926271.

It is a happy number.

172629961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 172629961 - 2¹ = 172629959 is a prime.

It is a super-2 number, since 2×172629961² = 59602206869723042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172629911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12036 + ... + 22138.

It is an arithmetic number, because the mean of its divisors is an integer number (24673968).

Almost surely, 2^172629961 is an apocalyptic number.

It is an amenable number.

172629961 is a deficient number, since it is larger than the sum of its proper divisors (24761783).

172629961 is a wasteful number, since it uses less digits than its factorization.

172629961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12551.

The product of its digits is 81648, while the sum is 43.

The square root of 172629961 is about 13138.8721357657. The cubic root of 172629961 is about 556.8079030554.

The spelling of 172629961 in words is "one hundred seventy-two million, six hundred twenty-nine thousand, nine hundred sixty-one".