162772921 has 2 divisors, whose sum is σ = 162772922. Its totient is φ = 162772920.

The previous prime is 162772873. The next prime is 162772933. The reversal of 162772921 is 129277261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147865600 + 14907321 = 12160^2 + 3861^2 .

It is an emirp because it is prime and its reverse (129277261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162772921 - 2⁹ = 162772409 is a prime.

It is not a weakly prime, because it can be changed into another prime (162772121) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81386460 + 81386461.

It is an arithmetic number, because the mean of its divisors is an integer number (81386461).

Almost surely, 2^162772921 is an apocalyptic number.

It is an amenable number.

162772921 is a deficient number, since it is larger than the sum of its proper divisors (1).

162772921 is an equidigital number, since it uses as much as digits as its factorization.

162772921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 162772921 is about 12758.2491353634. The cubic root of 162772921 is about 546.0017722350.

The spelling of 162772921 in words is "one hundred sixty-two million, seven hundred seventy-two thousand, nine hundred twenty-one".