40890131 has 2 divisors, whose sum is σ = 40890132. Its totient is φ = 40890130.

The previous prime is 40890103. The next prime is 40890137. The reversal of 40890131 is 13109804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40890131 - 2¹⁸ = 40627987 is a prime.

It is a super-2 number, since 2×40890131² = 3344005626394322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40890131.

It is not a weakly prime, because it can be changed into another prime (40890137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20445065 + 20445066.

It is an arithmetic number, because the mean of its divisors is an integer number (20445066).

Almost surely, 2^40890131 is an apocalyptic number.

40890131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40890131 is an equidigital number, since it uses as much as digits as its factorization.

40890131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 40890131 is about 6394.5391546225. The cubic root of 40890131 is about 344.5134385976.

Adding to 40890131 its reverse (13109804), we get a palindrome (53999935).

The spelling of 40890131 in words is "forty million, eight hundred ninety thousand, one hundred thirty-one".