508978069 has 2 divisors, whose sum is σ = 508978070. Its totient is φ = 508978068.

The previous prime is 508978049. The next prime is 508978081. The reversal of 508978069 is 960879805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395811025 + 113167044 = 19895^2 + 10638^2 .

It is a cyclic number.

It is not a de Polignac number, because 508978069 - 2⁵ = 508978037 is a prime.

It is a super-2 number, since 2×508978069² = 518117349445937522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (508978009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254489034 + 254489035.

It is an arithmetic number, because the mean of its divisors is an integer number (254489035).

Almost surely, 2^508978069 is an apocalyptic number.

It is an amenable number.

508978069 is a deficient number, since it is larger than the sum of its proper divisors (1).

508978069 is an equidigital number, since it uses as much as digits as its factorization.

508978069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 508978069 is about 22560.5423028792. The cubic root of 508978069 is about 798.4229708708.

The spelling of 508978069 in words is "five hundred eight million, nine hundred seventy-eight thousand, sixty-nine".