393013091 has 2 divisors, whose sum is σ = 393013092. Its totient is φ = 393013090.

The previous prime is 393013087. The next prime is 393013097. The reversal of 393013091 is 190310393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 393013091 - 2² = 393013087 is a prime.

It is not a weakly prime, because it can be changed into another prime (393013097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196506545 + 196506546.

It is an arithmetic number, because the mean of its divisors is an integer number (196506546).

Almost surely, 2^393013091 is an apocalyptic number.

393013091 is a deficient number, since it is larger than the sum of its proper divisors (1).

393013091 is an equidigital number, since it uses as much as digits as its factorization.

393013091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 393013091 is about 19824.5577756479. The cubic root of 393013091 is about 732.4910774810.

The spelling of 393013091 in words is "three hundred ninety-three million, thirteen thousand, ninety-one".