172621627 has 2 divisors, whose sum is σ = 172621628. Its totient is φ = 172621626.

The previous prime is 172621619. The next prime is 172621637. The reversal of 172621627 is 726126271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172621627 - 2³ = 172621619 is a prime.

It is a super-2 number, since 2×172621627² = 59596452216254258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172621592 and 172621601.

It is not a weakly prime, because it can be changed into another prime (172621607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86310813 + 86310814.

It is an arithmetic number, because the mean of its divisors is an integer number (86310814).

Almost surely, 2^172621627 is an apocalyptic number.

172621627 is a deficient number, since it is larger than the sum of its proper divisors (1).

172621627 is an equidigital number, since it uses as much as digits as its factorization.

172621627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 172621627 is about 13138.5549814278. The cubic root of 172621627 is about 556.7989426337.

Adding to 172621627 its reverse (726126271), we get a palindrome (898747898).

The spelling of 172621627 in words is "one hundred seventy-two million, six hundred twenty-one thousand, six hundred twenty-seven".