172022761 has 2 divisors, whose sum is σ = 172022762. Its totient is φ = 172022760.

The previous prime is 172022749. The next prime is 172022783. The reversal of 172022761 is 167220271.

172022761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95355225 + 76667536 = 9765^2 + 8756^2 .

It is a cyclic number.

It is not a de Polignac number, because 172022761 - 2⁷ = 172022633 is a prime.

It is not a weakly prime, because it can be changed into another prime (172022261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86011380 + 86011381.

It is an arithmetic number, because the mean of its divisors is an integer number (86011381).

Almost surely, 2^172022761 is an apocalyptic number.

It is an amenable number.

172022761 is a deficient number, since it is larger than the sum of its proper divisors (1).

172022761 is an equidigital number, since it uses as much as digits as its factorization.

172022761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 172022761 is about 13115.7447748879. The cubic root of 172022761 is about 556.1543067132.

The spelling of 172022761 in words is "one hundred seventy-two million, twenty-two thousand, seven hundred sixty-one".