40290693 has 4 divisors (see below), whose sum is σ = 53720928. Its totient is φ = 26860460.

The previous prime is 40290689. The next prime is 40290707. The reversal of 40290693 is 39609204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40290693 - 2² = 40290689 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40290673) 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, 6715113 + ... + 6715118.

It is an arithmetic number, because the mean of its divisors is an integer number (13430232).

Almost surely, 2^40290693 is an apocalyptic number.

It is an amenable number.

40290693 is a deficient number, since it is larger than the sum of its proper divisors (13430235).

40290693 is a wasteful number, since it uses less digits than its factorization.

40290693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13430234.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 40290693 is about 6347.4950177216. The cubic root of 40290693 is about 342.8216538912.

Adding to 40290693 its reverse (39609204), we get a palindrome (79899897).

The spelling of 40290693 in words is "forty million, two hundred ninety thousand, six hundred ninety-three".