611625997 has 2 divisors, whose sum is σ = 611625998. Its totient is φ = 611625996.

The previous prime is 611625967. The next prime is 611626009. The reversal of 611625997 is 799526116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306460036 + 305165961 = 17506^2 + 17469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611625997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611625907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305812998 + 305812999.

It is an arithmetic number, because the mean of its divisors is an integer number (305812999).

Almost surely, 2^611625997 is an apocalyptic number.

It is an amenable number.

611625997 is a deficient number, since it is larger than the sum of its proper divisors (1).

611625997 is an equidigital number, since it uses as much as digits as its factorization.

611625997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 46.

The square root of 611625997 is about 24731.0735108689. The cubic root of 611625997 is about 848.8454900397.

The spelling of 611625997 in words is "six hundred eleven million, six hundred twenty-five thousand, nine hundred ninety-seven".