940633381 has 2 divisors, whose sum is σ = 940633382. Its totient is φ = 940633380.

The previous prime is 940633367. The next prime is 940633387. The reversal of 940633381 is 183336049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 563302756 + 377330625 = 23734^2 + 19425^2 .

It is a cyclic number.

It is not a de Polignac number, because 940633381 - 2²⁷ = 806415653 is a prime.

It is a super-2 number, since 2×940633381² = 1769582314902982322, which contains 22 as substring.

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 940633381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940633387) 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, 470316690 + 470316691.

It is an arithmetic number, because the mean of its divisors is an integer number (470316691).

Almost surely, 2^940633381 is an apocalyptic number.

It is an amenable number.

940633381 is a deficient number, since it is larger than the sum of its proper divisors (1).

940633381 is an equidigital number, since it uses as much as digits as its factorization.

940633381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 940633381 is about 30669.7469992825. The cubic root of 940633381 is about 979.8060774836.

The spelling of 940633381 in words is "nine hundred forty million, six hundred thirty-three thousand, three hundred eighty-one".