172050987 has 6 divisors (see below), whose sum is σ = 229431612. Its totient is φ = 114685512.

The previous prime is 172050979. The next prime is 172051007. The reversal of 172050987 is 789050271.

It is not a de Polignac number, because 172050987 - 2³ = 172050979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172000987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18933 + ... + 26505.

It is an arithmetic number, because the mean of its divisors is an integer number (38238602).

Almost surely, 2^172050987 is an apocalyptic number.

172050987 is a deficient number, since it is larger than the sum of its proper divisors (57380625).

172050987 is an frugal number, since it uses more digits than its factorization.

172050987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15149 (or 7576 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 172050987 is about 13116.8207657191. The cubic root of 172050987 is about 556.1847235272.

The spelling of 172050987 in words is "one hundred seventy-two million, fifty thousand, nine hundred eighty-seven".