172671994 has 32 divisors (see below), whose sum is σ = 297271296. Its totient is φ = 74455920.

The previous prime is 172671991. The next prime is 172672001. The reversal of 172671994 is 499176271.

172671994 = 3957² + 3958² + ... + 3967².

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (172671991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62919 + ... + 65605.

It is an arithmetic number, because the mean of its divisors is an integer number (9289728).

Almost surely, 2^172671994 is an apocalyptic number.

172671994 is a deficient number, since it is larger than the sum of its proper divisors (124599302).

172671994 is a wasteful number, since it uses less digits than its factorization.

172671994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850.

The product of its digits is 190512, while the sum is 46.

The square root of 172671994 is about 13140.4716049311. The cubic root of 172671994 is about 556.8530910540.

The spelling of 172671994 in words is "one hundred seventy-two million, six hundred seventy-one thousand, nine hundred ninety-four".