40390951 has 2 divisors, whose sum is σ = 40390952. Its totient is φ = 40390950.

The previous prime is 40390927. The next prime is 40390957. The reversal of 40390951 is 15909304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40390951 - 2¹³ = 40382759 is a prime.

It is equal to p_2456059 and since 40390951 and 2456059 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40390957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20195475 + 20195476.

It is an arithmetic number, because the mean of its divisors is an integer number (20195476).

Almost surely, 2^40390951 is an apocalyptic number.

40390951 is the 4020-th centered pentagonal number.

40390951 is a deficient number, since it is larger than the sum of its proper divisors (1).

40390951 is an equidigital number, since it uses as much as digits as its factorization.

40390951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 40390951 is about 6355.3875570259. The cubic root of 40390951 is about 343.1057736326.

The spelling of 40390951 in words is "forty million, three hundred ninety thousand, nine hundred fifty-one".