615400601 has 2 divisors, whose sum is σ = 615400602. Its totient is φ = 615400600.

The previous prime is 615400573. The next prime is 615400607. The reversal of 615400601 is 106004516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536617225 + 78783376 = 23165^2 + 8876^2 .

It is a cyclic number.

It is not a de Polignac number, because 615400601 - 2⁶ = 615400537 is a prime.

It is a super-2 number, since 2×615400601² = 757435799422322402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (615400607) 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, 307700300 + 307700301.

It is an arithmetic number, because the mean of its divisors is an integer number (307700301).

Almost surely, 2^615400601 is an apocalyptic number.

It is an amenable number.

615400601 is a deficient number, since it is larger than the sum of its proper divisors (1).

615400601 is an equidigital number, since it uses as much as digits as its factorization.

615400601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 615400601 is about 24807.2691161280. The cubic root of 615400601 is about 850.5881055745.

The spelling of 615400601 in words is "six hundred fifteen million, four hundred thousand, six hundred one".