40312007 has 2 divisors, whose sum is σ = 40312008. Its totient is φ = 40312006.

The previous prime is 40312003. The next prime is 40312009. The reversal of 40312007 is 70021304.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40312007 - 2² = 40312003 is a prime.

Together with 40312009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40312003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156003 + 20156004.

It is an arithmetic number, because the mean of its divisors is an integer number (20156004).

Almost surely, 2^40312007 is an apocalyptic number.

40312007 is a deficient number, since it is larger than the sum of its proper divisors (1).

40312007 is an equidigital number, since it uses as much as digits as its factorization.

40312007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 40312007 is about 6349.1737257694. The cubic root of 40312007 is about 342.8820947532.

The spelling of 40312007 in words is "forty million, three hundred twelve thousand, seven".