611813057 has 2 divisors, whose sum is σ = 611813058. Its totient is φ = 611813056.

The previous prime is 611813021. The next prime is 611813071. The reversal of 611813057 is 750318116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432681601 + 179131456 = 20801^2 + 13384^2 .

It is a cyclic number.

It is not a de Polignac number, because 611813057 - 2¹² = 611808961 is a prime.

It is not a weakly prime, because it can be changed into another prime (611803057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305906528 + 305906529.

It is an arithmetic number, because the mean of its divisors is an integer number (305906529).

Almost surely, 2^611813057 is an apocalyptic number.

It is an amenable number.

611813057 is a deficient number, since it is larger than the sum of its proper divisors (1).

611813057 is an equidigital number, since it uses as much as digits as its factorization.

611813057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 611813057 is about 24734.8551036791. The cubic root of 611813057 is about 848.9320183284.

The spelling of 611813057 in words is "six hundred eleven million, eight hundred thirteen thousand, fifty-seven".