397580508877 has 2 divisors, whose sum is σ = 397580508878. Its totient is φ = 397580508876.

The previous prime is 397580508859. The next prime is 397580508929. The reversal of 397580508877 is 778805085793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278072710276 + 119507798601 = 527326^2 + 345699^2 .

It is a cyclic number.

It is not a de Polignac number, because 397580508877 - 2²³ = 397572120269 is a prime.

It is a super-2 number, since 2×397580508877² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397580503877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198790254438 + 198790254439.

It is an arithmetic number, because the mean of its divisors is an integer number (198790254439).

Almost surely, 2^397580508877 is an apocalyptic number.

It is an amenable number.

397580508877 is a deficient number, since it is larger than the sum of its proper divisors (1).

397580508877 is an equidigital number, since it uses as much as digits as its factorization.

397580508877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118540800, while the sum is 67.

The spelling of 397580508877 in words is "three hundred ninety-seven billion, five hundred eighty million, five hundred eight thousand, eight hundred seventy-seven".