615123997 has 2 divisors, whose sum is σ = 615123998. Its totient is φ = 615123996.

The previous prime is 615123967. The next prime is 615124007. The reversal of 615123997 is 799321516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 523997881 + 91126116 = 22891^2 + 9546^2 .

It is a cyclic number.

It is not a de Polignac number, because 615123997 - 2¹⁹ = 614599709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615123967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307561998 + 307561999.

It is an arithmetic number, because the mean of its divisors is an integer number (307561999).

Almost surely, 2^615123997 is an apocalyptic number.

It is an amenable number.

615123997 is a deficient number, since it is larger than the sum of its proper divisors (1).

615123997 is an equidigital number, since it uses as much as digits as its factorization.

615123997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 43.

The square root of 615123997 is about 24801.6934300866. The cubic root of 615123997 is about 850.4606485811.

The spelling of 615123997 in words is "six hundred fifteen million, one hundred twenty-three thousand, nine hundred ninety-seven".