172075987 has 2 divisors, whose sum is σ = 172075988. Its totient is φ = 172075986.

The previous prime is 172075961. The next prime is 172075991. The reversal of 172075987 is 789570271.

172075987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172075987 - 2²⁷ = 37858259 is a prime.

It is a super-2 number, since 2×172075987² = 59220290604048338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172075927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86037993 + 86037994.

It is an arithmetic number, because the mean of its divisors is an integer number (86037994).

Almost surely, 2^172075987 is an apocalyptic number.

172075987 is a deficient number, since it is larger than the sum of its proper divisors (1).

172075987 is an equidigital number, since it uses as much as digits as its factorization.

172075987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 172075987 is about 13117.7737059304. The cubic root of 172075987 is about 556.2116611711.

The spelling of 172075987 in words is "one hundred seventy-two million, seventy-five thousand, nine hundred eighty-seven".