39863969 has 2 divisors, whose sum is σ = 39863970. Its totient is φ = 39863968.

The previous prime is 39863959. The next prime is 39863977. The reversal of 39863969 is 96936893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39853969 + 10000 = 6313^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 39863969 - 2¹⁶ = 39798433 is a prime.

It is a super-2 number, since 2×39863969² = 3178272048865922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39863969.

It is not a weakly prime, because it can be changed into another prime (39863909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19931984 + 19931985.

It is an arithmetic number, because the mean of its divisors is an integer number (19931985).

Almost surely, 2^39863969 is an apocalyptic number.

It is an amenable number.

39863969 is a deficient number, since it is larger than the sum of its proper divisors (1).

39863969 is an equidigital number, since it uses as much as digits as its factorization.

39863969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 53.

The square root of 39863969 is about 6313.7919667978. The cubic root of 39863969 is about 341.6070661324.

The spelling of 39863969 in words is "thirty-nine million, eight hundred sixty-three thousand, nine hundred sixty-nine".