940623391 has 2 divisors, whose sum is σ = 940623392. Its totient is φ = 940623390.

The previous prime is 940623377. The next prime is 940623401. The reversal of 940623391 is 193326049.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940623391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 940623391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940623301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470311695 + 470311696.

It is an arithmetic number, because the mean of its divisors is an integer number (470311696).

Almost surely, 2^940623391 is an apocalyptic number.

940623391 is a deficient number, since it is larger than the sum of its proper divisors (1).

940623391 is an equidigital number, since it uses as much as digits as its factorization.

940623391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 940623391 is about 30669.5841347743. The cubic root of 940623391 is about 979.8026087934.

The spelling of 940623391 in words is "nine hundred forty million, six hundred twenty-three thousand, three hundred ninety-one".