164031999 has 8 divisors (see below), whose sum is σ = 218799792. Its totient is φ = 109309440.

The previous prime is 164031991. The next prime is 164032009. The reversal of 164031999 is 999130461.

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

It is not a de Polignac number, because 164031999 - 2³ = 164031991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164031999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164031991) 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, 1672 + ... + 18189.

It is an arithmetic number, because the mean of its divisors is an integer number (27349974).

Almost surely, 2^164031999 is an apocalyptic number.

164031999 is a deficient number, since it is larger than the sum of its proper divisors (54767793).

164031999 is a wasteful number, since it uses less digits than its factorization.

164031999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22617.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 164031999 is about 12807.4977649813. The cubic root of 164031999 is about 547.4059653769.

The spelling of 164031999 in words is "one hundred sixty-four million, thirty-one thousand, nine hundred ninety-nine".