161031629 has 8 divisors (see below), whose sum is σ = 175821888. Its totient is φ = 146266560.

The previous prime is 161031623. The next prime is 161031653. The reversal of 161031629 is 926130161.

161031629 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 not a de Polignac number, because 161031629 - 2⁸ = 161031373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161031623) 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, 8624 + ... + 19910.

It is an arithmetic number, because the mean of its divisors is an integer number (21977736).

Almost surely, 2^161031629 is an apocalyptic number.

It is an amenable number.

161031629 is a deficient number, since it is larger than the sum of its proper divisors (14790259).

161031629 is a wasteful number, since it uses less digits than its factorization.

161031629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12595.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 161031629 is about 12689.8238364447. The cubic root of 161031629 is about 544.0478045595.

The spelling of 161031629 in words is "one hundred sixty-one million, thirty-one thousand, six hundred twenty-nine".