361991479 has 2 divisors, whose sum is σ = 361991480. Its totient is φ = 361991478.

The previous prime is 361991467. The next prime is 361991519. The reversal of 361991479 is 974199163.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 361991479 - 2²⁵ = 328437047 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 (361991429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180995739 + 180995740.

It is an arithmetic number, because the mean of its divisors is an integer number (180995740).

Almost surely, 2^361991479 is an apocalyptic number.

361991479 is a deficient number, since it is larger than the sum of its proper divisors (1).

361991479 is an equidigital number, since it uses as much as digits as its factorization.

361991479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 361991479 is about 19026.0736622142. The cubic root of 361991479 is about 712.6880047222.

The spelling of 361991479 in words is "three hundred sixty-one million, nine hundred ninety-one thousand, four hundred seventy-nine".