172903312 has 10 divisors (see below), whose sum is σ = 335000198. Its totient is φ = 86451648.

The previous prime is 172903309. The next prime is 172903369. The reversal of 172903312 is 213309271.

It can be written as a sum of positive squares in only one way, i.e., 100721296 + 72182016 = 10036^2 + 8496^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5403213 + ... + 5403244.

Almost surely, 2^172903312 is an apocalyptic number.

It is an amenable number.

172903312 is a deficient number, since it is larger than the sum of its proper divisors (162096886).

172903312 is a wasteful number, since it uses less digits than its factorization.

172903312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806465 (or 10806459 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 172903312 is about 13149.2703980107. The cubic root of 172903312 is about 557.1016406565.

It can be divided in two parts, 17290 and 3312, that added together give a palindrome (20602).

The spelling of 172903312 in words is "one hundred seventy-two million, nine hundred three thousand, three hundred twelve".