368613521 has 2 divisors, whose sum is σ = 368613522. Its totient is φ = 368613520.

The previous prime is 368613481. The next prime is 368613523. The reversal of 368613521 is 125316863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227859025 + 140754496 = 15095^2 + 11864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-368613521 is a prime.

Together with 368613523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (368613523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184306760 + 184306761.

It is an arithmetic number, because the mean of its divisors is an integer number (184306761).

Almost surely, 2^368613521 is an apocalyptic number.

It is an amenable number.

368613521 is a deficient number, since it is larger than the sum of its proper divisors (1).

368613521 is an equidigital number, since it uses as much as digits as its factorization.

368613521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 368613521 is about 19199.3104303254. The cubic root of 368613521 is about 717.0075913419.

The spelling of 368613521 in words is "three hundred sixty-eight million, six hundred thirteen thousand, five hundred twenty-one".