93661391 has 2 divisors, whose sum is σ = 93661392. Its totient is φ = 93661390.

The previous prime is 93661369. The next prime is 93661417. The reversal of 93661391 is 19316639.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 93661391 - 2⁶ = 93661327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93661331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46830695 + 46830696.

It is an arithmetic number, because the mean of its divisors is an integer number (46830696).

Almost surely, 2^93661391 is an apocalyptic number.

93661391 is a deficient number, since it is larger than the sum of its proper divisors (1).

93661391 is an equidigital number, since it uses as much as digits as its factorization.

93661391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 38.

The square root of 93661391 is about 9677.8815347162. The cubic root of 93661391 is about 454.1369802141.

The spelling of 93661391 in words is "ninety-three million, six hundred sixty-one thousand, three hundred ninety-one".