15603087397 has 2 divisors, whose sum is σ = 15603087398. Its totient is φ = 15603087396.

The previous prime is 15603087359. The next prime is 15603087433. The reversal of 15603087397 is 79378030651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15602757921 + 329476 = 124911^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 15603087397 - 2²³ = 15594698789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15603087397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15603087497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7801543698 + 7801543699.

It is an arithmetic number, because the mean of its divisors is an integer number (7801543699).

Almost surely, 2^15603087397 is an apocalyptic number.

It is an amenable number.

15603087397 is a deficient number, since it is larger than the sum of its proper divisors (1).

15603087397 is an equidigital number, since it uses as much as digits as its factorization.

15603087397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 15603087397 in words is "fifteen billion, six hundred three million, eighty-seven thousand, three hundred ninety-seven".