40690131 has 4 divisors (see below), whose sum is σ = 54253512. Its totient is φ = 27126752.

The previous prime is 40690123. The next prime is 40690147. The reversal of 40690131 is 13109604.

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

It is a cyclic number.

It is not a de Polignac number, because 40690131 - 2³ = 40690123 is a prime.

It is a super-3 number, since 3×40690131³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (40694131) 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, 6781686 + ... + 6781691.

It is an arithmetic number, because the mean of its divisors is an integer number (13563378).

Almost surely, 2^40690131 is an apocalyptic number.

40690131 is a deficient number, since it is larger than the sum of its proper divisors (13563381).

40690131 is a wasteful number, since it uses less digits than its factorization.

40690131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563380.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 40690131 is about 6378.8816417927. The cubic root of 40690131 is about 343.9508307000.

Adding to 40690131 its reverse (13109604), we get a palindrome (53799735).

The spelling of 40690131 in words is "forty million, six hundred ninety thousand, one hundred thirty-one".