361387021 has 2 divisors, whose sum is σ = 361387022. Its totient is φ = 361387020.

The previous prime is 361386937. The next prime is 361387099. The reversal of 361387021 is 120783163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288626121 + 72760900 = 16989^2 + 8530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361387021 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 (361387121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180693510 + 180693511.

It is an arithmetic number, because the mean of its divisors is an integer number (180693511).

Almost surely, 2^361387021 is an apocalyptic number.

It is an amenable number.

361387021 is a deficient number, since it is larger than the sum of its proper divisors (1).

361387021 is an equidigital number, since it uses as much as digits as its factorization.

361387021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 361387021 is about 19010.1820348991. The cubic root of 361387021 is about 712.2910985396.

The spelling of 361387021 in words is "three hundred sixty-one million, three hundred eighty-seven thousand, twenty-one".