615201397 has 2 divisors, whose sum is σ = 615201398. Its totient is φ = 615201396.

The previous prime is 615201383. The next prime is 615201407. The reversal of 615201397 is 793102516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364580836 + 250620561 = 19094^2 + 15831^2 .

It is a cyclic number.

It is not a de Polignac number, because 615201397 - 2¹⁵ = 615168629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615201347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307600698 + 307600699.

It is an arithmetic number, because the mean of its divisors is an integer number (307600699).

Almost surely, 2^615201397 is an apocalyptic number.

It is an amenable number.

615201397 is a deficient number, since it is larger than the sum of its proper divisors (1).

615201397 is an equidigital number, since it uses as much as digits as its factorization.

615201397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 615201397 is about 24803.2537583278. The cubic root of 615201397 is about 850.4963177545.

The spelling of 615201397 in words is "six hundred fifteen million, two hundred one thousand, three hundred ninety-seven".