172099937 has 2 divisors, whose sum is σ = 172099938. Its totient is φ = 172099936.

The previous prime is 172099883. The next prime is 172099969. The reversal of 172099937 is 739990271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138274081 + 33825856 = 11759^2 + 5816^2 .

It is a cyclic number.

It is not a de Polignac number, because 172099937 - 2¹² = 172095841 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 172099891 and 172099900.

It is not a weakly prime, because it can be changed into another prime (172099997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86049968 + 86049969.

It is an arithmetic number, because the mean of its divisors is an integer number (86049969).

Almost surely, 2^172099937 is an apocalyptic number.

It is an amenable number.

172099937 is a deficient number, since it is larger than the sum of its proper divisors (1).

172099937 is an equidigital number, since it uses as much as digits as its factorization.

172099937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 172099937 is about 13118.6865577313. The cubic root of 172099937 is about 556.2374649871.

The spelling of 172099937 in words is "one hundred seventy-two million, ninety-nine thousand, nine hundred thirty-seven".