361557197 has 2 divisors, whose sum is σ = 361557198. Its totient is φ = 361557196.

The previous prime is 361557193. The next prime is 361557211. The reversal of 361557197 is 791755163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351150121 + 10407076 = 18739^2 + 3226^2 .

It is a cyclic number.

It is not a de Polignac number, because 361557197 - 2² = 361557193 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (361557191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180778598 + 180778599.

It is an arithmetic number, because the mean of its divisors is an integer number (180778599).

Almost surely, 2^361557197 is an apocalyptic number.

It is an amenable number.

361557197 is a deficient number, since it is larger than the sum of its proper divisors (1).

361557197 is an equidigital number, since it uses as much as digits as its factorization.

361557197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 198450, while the sum is 44.

The square root of 361557197 is about 19014.6574252601. The cubic root of 361557197 is about 712.4028861997.

The spelling of 361557197 in words is "three hundred sixty-one million, five hundred fifty-seven thousand, one hundred ninety-seven".