172991300 has 36 divisors (see below), whose sum is σ = 384556116. Its totient is φ = 67507200.

The previous prime is 172991267. The next prime is 172991309. The reversal of 172991300 is 3199271.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 25563136 + 147428164 = 5056^2 + 12142^2 .

It is not an unprimeable number, because it can be changed into a prime (172991309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16997 + ... + 25196.

Almost surely, 2^172991300 is an apocalyptic number.

172991300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172991300 is an abundant number, since it is smaller than the sum of its proper divisors (211564816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172991300 is a wasteful number, since it uses less digits than its factorization.

172991300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42248 (or 42241 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 172991300 is about 13152.6157094321. The cubic root of 172991300 is about 557.1961249592.

The spelling of 172991300 in words is "one hundred seventy-two million, nine hundred ninety-one thousand, three hundred".