39860969 has 2 divisors, whose sum is σ = 39860970. Its totient is φ = 39860968.

The previous prime is 39860959. The next prime is 39860981. The reversal of 39860969 is 96906893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34515625 + 5345344 = 5875^2 + 2312^2 .

It is a cyclic number.

It is not a de Polignac number, because 39860969 - 2⁸ = 39860713 is a prime.

It is a super-2 number, since 2×39860969² = 3177793699237922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39860959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19930484 + 19930485.

It is an arithmetic number, because the mean of its divisors is an integer number (19930485).

Almost surely, 2^39860969 is an apocalyptic number.

It is an amenable number.

39860969 is a deficient number, since it is larger than the sum of its proper divisors (1).

39860969 is an equidigital number, since it uses as much as digits as its factorization.

39860969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 39860969 is about 6313.5543871895. The cubic root of 39860969 is about 341.5984965984.

The spelling of 39860969 in words is "thirty-nine million, eight hundred sixty thousand, nine hundred sixty-nine".