40769431 has 2 divisors, whose sum is σ = 40769432. Its totient is φ = 40769430.

The previous prime is 40769429. The next prime is 40769441. The reversal of 40769431 is 13496704.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40769431 - 2¹ = 40769429 is a prime.

It is a super-2 number, since 2×40769431² = 3324293008127522, which contains 22 as substring.

Together with 40769429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40769401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20384715 + 20384716.

It is an arithmetic number, because the mean of its divisors is an integer number (20384716).

Almost surely, 2^40769431 is an apocalyptic number.

40769431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40769431 is an equidigital number, since it uses as much as digits as its factorization.

40769431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 40769431 is about 6385.0944393956. The cubic root of 40769431 is about 344.1741248227.

The spelling of 40769431 in words is "forty million, seven hundred sixty-nine thousand, four hundred thirty-one".