508772921 has 2 divisors, whose sum is σ = 508772922. Its totient is φ = 508772920.

The previous prime is 508772833. The next prime is 508772933. The reversal of 508772921 is 129277805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360810025 + 147962896 = 18995^2 + 12164^2 .

It is a cyclic number.

It is not a de Polignac number, because 508772921 - 2¹⁰ = 508771897 is a prime.

It is not a weakly prime, because it can be changed into another prime (508772951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254386460 + 254386461.

It is an arithmetic number, because the mean of its divisors is an integer number (254386461).

Almost surely, 2^508772921 is an apocalyptic number.

It is an amenable number.

508772921 is a deficient number, since it is larger than the sum of its proper divisors (1).

508772921 is an equidigital number, since it uses as much as digits as its factorization.

508772921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 508772921 is about 22555.9952340836. The cubic root of 508772921 is about 798.3156860343.

The spelling of 508772921 in words is "five hundred eight million, seven hundred seventy-two thousand, nine hundred twenty-one".