172557863 has 2 divisors, whose sum is σ = 172557864. Its totient is φ = 172557862.

The previous prime is 172557809. The next prime is 172557907. The reversal of 172557863 is 368755271.

It is a happy number.

It is an a-pointer prime, because the next prime (172557907) can be obtained adding 172557863 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172557863 - 2²⁰ = 171509287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172557263) 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 as a sum of consecutive naturals, namely, 86278931 + 86278932.

It is an arithmetic number, because the mean of its divisors is an integer number (86278932).

Almost surely, 2^172557863 is an apocalyptic number.

172557863 is a deficient number, since it is larger than the sum of its proper divisors (1).

172557863 is an equidigital number, since it uses as much as digits as its factorization.

172557863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 44.

The square root of 172557863 is about 13136.1281586318. The cubic root of 172557863 is about 556.7303762924.

The spelling of 172557863 in words is "one hundred seventy-two million, five hundred fifty-seven thousand, eight hundred sixty-three".