172628371 has 2 divisors, whose sum is σ = 172628372. Its totient is φ = 172628370.

The previous prime is 172628311. The next prime is 172628383. The reversal of 172628371 is 173826271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172628371 - 2¹¹ = 172626323 is a prime.

It is a super-2 number, since 2×172628371² = 59601108948227282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172628371.

It is not a weakly prime, because it can be changed into another prime (172628311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86314185 + 86314186.

It is an arithmetic number, because the mean of its divisors is an integer number (86314186).

Almost surely, 2^172628371 is an apocalyptic number.

172628371 is a deficient number, since it is larger than the sum of its proper divisors (1).

172628371 is an equidigital number, since it uses as much as digits as its factorization.

172628371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 172628371 is about 13138.8116281496. The cubic root of 172628371 is about 556.8061935660.

The spelling of 172628371 in words is "one hundred seventy-two million, six hundred twenty-eight thousand, three hundred seventy-one".