40431407 has 2 divisors, whose sum is σ = 40431408. Its totient is φ = 40431406.

The previous prime is 40431383. The next prime is 40431431. The reversal of 40431407 is 70413404.

It is a balanced prime because it is at equal distance from previous prime (40431383) and next prime (40431431).

It is a cyclic number.

It is not a de Polignac number, because 40431407 - 2¹² = 40427311 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40431437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215703 + 20215704.

It is an arithmetic number, because the mean of its divisors is an integer number (20215704).

Almost surely, 2^40431407 is an apocalyptic number.

40431407 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431407 is an equidigital number, since it uses as much as digits as its factorization.

40431407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40431407 is about 6358.5695718455. The cubic root of 40431407 is about 343.2202881882.

The spelling of 40431407 in words is "forty million, four hundred thirty-one thousand, four hundred seven".