1617795397 has 2 divisors, whose sum is σ = 1617795398. Its totient is φ = 1617795396.

The previous prime is 1617795383. The next prime is 1617795401. The reversal of 1617795397 is 7935977161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384286436 + 233508961 = 37206^2 + 15281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1617795397 - 2¹¹ = 1617793349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617795307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808897698 + 808897699.

It is an arithmetic number, because the mean of its divisors is an integer number (808897699).

Almost surely, 2^1617795397 is an apocalyptic number.

It is an amenable number.

1617795397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617795397 is an equidigital number, since it uses as much as digits as its factorization.

1617795397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2500470, while the sum is 55.

The square root of 1617795397 is about 40221.8273702228. The cubic root of 1617795397 is about 1173.9272894496.

The spelling of 1617795397 in words is "one billion, six hundred seventeen million, seven hundred ninety-five thousand, three hundred ninety-seven".