940057681 has 4 divisors (see below), whose sum is σ = 943403364. Its totient is φ = 936712000.

The previous prime is 940057673. The next prime is 940057693. The reversal of 940057681 is 186750049.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186750049 = 17 ⋅10985297.

It can be written as a sum of positive squares in 2 ways, for example, as 255712081 + 684345600 = 15991^2 + 26160^2 .

It is a cyclic number.

It is not a de Polignac number, because 940057681 - 2³ = 940057673 is a prime.

It is a super-2 number, since 2×940057681² = 1767416887214195522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (940052681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672420 + ... + 1672981.

It is an arithmetic number, because the mean of its divisors is an integer number (235850841).

Almost surely, 2^940057681 is an apocalyptic number.

It is an amenable number.

940057681 is a deficient number, since it is larger than the sum of its proper divisors (3345683).

940057681 is a wasteful number, since it uses less digits than its factorization.

940057681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345682.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 940057681 is about 30660.3600924712. The cubic root of 940057681 is about 979.6061450101.

It can be divided in two parts, 9400 and 57681, that added together give a square (67081 = 259²).

The spelling of 940057681 in words is "nine hundred forty million, fifty-seven thousand, six hundred eighty-one".