172412987 has 2 divisors, whose sum is σ = 172412988. Its totient is φ = 172412986.

The previous prime is 172412893. The next prime is 172413013. The reversal of 172412987 is 789214271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172412987 - 2¹² = 172408891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172412087) 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 as a sum of consecutive naturals, namely, 86206493 + 86206494.

It is an arithmetic number, because the mean of its divisors is an integer number (86206494).

Almost surely, 2^172412987 is an apocalyptic number.

172412987 is a deficient number, since it is larger than the sum of its proper divisors (1).

172412987 is an equidigital number, since it uses as much as digits as its factorization.

172412987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 172412987 is about 13130.6125904316. The cubic root of 172412987 is about 556.5745262455.

The spelling of 172412987 in words is "one hundred seventy-two million, four hundred twelve thousand, nine hundred eighty-seven".