40769429 has 2 divisors, whose sum is σ = 40769430. Its totient is φ = 40769428.

The previous prime is 40769423. The next prime is 40769431. The reversal of 40769429 is 92496704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29866225 + 10903204 = 5465^2 + 3302^2 .

It is a cyclic number.

It is not a de Polignac number, because 40769429 - 2⁸ = 40769173 is a prime.

Together with 40769431, 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 (40769423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20384714 + 20384715.

It is an arithmetic number, because the mean of its divisors is an integer number (20384715).

Almost surely, 2^40769429 is an apocalyptic number.

It is an amenable number.

40769429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40769429 is an equidigital number, since it uses as much as digits as its factorization.

40769429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 40769429 is about 6385.0942827808. The cubic root of 40769429 is about 344.1741191947.

The spelling of 40769429 in words is "forty million, seven hundred sixty-nine thousand, four hundred twenty-nine".