172628507 has 2 divisors, whose sum is σ = 172628508. Its totient is φ = 172628506.

The previous prime is 172628461. The next prime is 172628527. The reversal of 172628507 is 705826271.

It is a strong prime.

It is an emirp because it is prime and its reverse (705826271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172628507 is a prime.

It is not a weakly prime, because it can be changed into another prime (172628527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86314253 + 86314254.

It is an arithmetic number, because the mean of its divisors is an integer number (86314254).

Almost surely, 2^172628507 is an apocalyptic number.

172628507 is a deficient number, since it is larger than the sum of its proper divisors (1).

172628507 is an equidigital number, since it uses as much as digits as its factorization.

172628507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 172628507 is about 13138.8168036547. The cubic root of 172628507 is about 556.8063397869.

The spelling of 172628507 in words is "one hundred seventy-two million, six hundred twenty-eight thousand, five hundred seven".