172714621 has 2 divisors, whose sum is σ = 172714622. Its totient is φ = 172714620.

The previous prime is 172714583. The next prime is 172714627. The reversal of 172714621 is 126417271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99800100 + 72914521 = 9990^2 + 8539^2 .

It is a cyclic number.

It is not a de Polignac number, because 172714621 - 2⁹ = 172714109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172714627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86357310 + 86357311.

It is an arithmetic number, because the mean of its divisors is an integer number (86357311).

Almost surely, 2^172714621 is an apocalyptic number.

It is an amenable number.

172714621 is a deficient number, since it is larger than the sum of its proper divisors (1).

172714621 is an equidigital number, since it uses as much as digits as its factorization.

172714621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 172714621 is about 13142.0934785901. The cubic root of 172714621 is about 556.8989101494.

The spelling of 172714621 in words is "one hundred seventy-two million, seven hundred fourteen thousand, six hundred twenty-one".