39424769 has 2 divisors, whose sum is σ = 39424770. Its totient is φ = 39424768.

The previous prime is 39424757. The next prime is 39424789. The reversal of 39424769 is 96742493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39187600 + 237169 = 6260^2 + 487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39424769 is a prime.

It is a super-2 number, since 2×39424769² = 3108624821406722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39424789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19712384 + 19712385.

It is an arithmetic number, because the mean of its divisors is an integer number (19712385).

Almost surely, 2^39424769 is an apocalyptic number.

It is an amenable number.

39424769 is a deficient number, since it is larger than the sum of its proper divisors (1).

39424769 is an equidigital number, since it uses as much as digits as its factorization.

39424769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 39424769 is about 6278.9146355083. The cubic root of 39424769 is about 340.3478821093.

The spelling of 39424769 in words is "thirty-nine million, four hundred twenty-four thousand, seven hundred sixty-nine".