40357943 has 4 divisors (see below), whose sum is σ = 40380600. Its totient is φ = 40335288.

The previous prime is 40357931. The next prime is 40357973. The reversal of 40357943 is 34975304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40357943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40357903) 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, 8405 + ... + 12302.

It is an arithmetic number, because the mean of its divisors is an integer number (10095150).

Almost surely, 2^40357943 is an apocalyptic number.

40357943 is a deficient number, since it is larger than the sum of its proper divisors (22657).

40357943 is a wasteful number, since it uses less digits than its factorization.

40357943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22656.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 40357943 is about 6352.7901744037. The cubic root of 40357943 is about 343.0122846906.

The spelling of 40357943 in words is "forty million, three hundred fifty-seven thousand, nine hundred forty-three".