40351957 has 2 divisors, whose sum is σ = 40351958. Its totient is φ = 40351956.

The previous prime is 40351937. The next prime is 40351967. The reversal of 40351957 is 75915304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30902481 + 9449476 = 5559^2 + 3074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40351957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40351907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20175978 + 20175979.

It is an arithmetic number, because the mean of its divisors is an integer number (20175979).

Almost surely, 2^40351957 is an apocalyptic number.

It is an amenable number.

40351957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40351957 is an equidigital number, since it uses as much as digits as its factorization.

40351957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 40351957 is about 6352.3190253639. The cubic root of 40351957 is about 342.9953250134.

The spelling of 40351957 in words is "forty million, three hundred fifty-one thousand, nine hundred fifty-seven".