642272711 has 2 divisors, whose sum is σ = 642272712. Its totient is φ = 642272710.

The previous prime is 642272693. The next prime is 642272717. The reversal of 642272711 is 117272246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642272711 - 2¹⁴ = 642256327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642272717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321136355 + 321136356.

It is an arithmetic number, because the mean of its divisors is an integer number (321136356).

Almost surely, 2^642272711 is an apocalyptic number.

642272711 is a deficient number, since it is larger than the sum of its proper divisors (1).

642272711 is an equidigital number, since it uses as much as digits as its factorization.

642272711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 642272711 is about 25343.0998695897. The cubic root of 642272711 is about 862.7927557900.

The spelling of 642272711 in words is "six hundred forty-two million, two hundred seventy-two thousand, seven hundred eleven".