172990670 has 16 divisors (see below), whose sum is σ = 311536368. Its totient is φ = 69162240.

The previous prime is 172990669. The next prime is 172990709. The reversal of 172990670 is 76099271.

It is a happy number.

172990670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31037 + ... + 36183.

It is an arithmetic number, because the mean of its divisors is an integer number (19471023).

Almost surely, 2^172990670 is an apocalyptic number.

172990670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172990670 is a deficient number, since it is larger than the sum of its proper divisors (138545698).

172990670 is a wasteful number, since it uses less digits than its factorization.

172990670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 172990670 is about 13152.5917598016. The cubic root of 172990670 is about 557.1954485592.

The spelling of 172990670 in words is "one hundred seventy-two million, nine hundred ninety thousand, six hundred seventy".