940123813 has 2 divisors, whose sum is σ = 940123814. Its totient is φ = 940123812.

The previous prime is 940123739. The next prime is 940123823. The reversal of 940123813 is 318321049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711448929 + 228674884 = 26673^2 + 15122^2 .

It is a cyclic number.

It is not a de Polignac number, because 940123813 - 2¹³ = 940115621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940123823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470061906 + 470061907.

It is an arithmetic number, because the mean of its divisors is an integer number (470061907).

Almost surely, 2^940123813 is an apocalyptic number.

It is an amenable number.

940123813 is a deficient number, since it is larger than the sum of its proper divisors (1).

940123813 is an equidigital number, since it uses as much as digits as its factorization.

940123813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 940123813 is about 30661.4385344197. The cubic root of 940123813 is about 979.6291158681.

The spelling of 940123813 in words is "nine hundred forty million, one hundred twenty-three thousand, eight hundred thirteen".