40629913 has 2 divisors, whose sum is σ = 40629914. Its totient is φ = 40629912.

The previous prime is 40629887. The next prime is 40629917. The reversal of 40629913 is 31992604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31945104 + 8684809 = 5652^2 + 2947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40629913 is a prime.

It is not a weakly prime, because it can be changed into another prime (40629917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20314956 + 20314957.

It is an arithmetic number, because the mean of its divisors is an integer number (20314957).

Almost surely, 2^40629913 is an apocalyptic number.

It is an amenable number.

40629913 is a deficient number, since it is larger than the sum of its proper divisors (1).

40629913 is an equidigital number, since it uses as much as digits as its factorization.

40629913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 40629913 is about 6374.1597877681. The cubic root of 40629913 is about 343.7810740835.

The spelling of 40629913 in words is "forty million, six hundred twenty-nine thousand, nine hundred thirteen".