39654889 has 2 divisors, whose sum is σ = 39654890. Its totient is φ = 39654888.

The previous prime is 39654851. The next prime is 39654899. The reversal of 39654889 is 98845693.

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., 39501225 + 153664 = 6285^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 39654889 - 2¹³ = 39646697 is a prime.

It is not a weakly prime, because it can be changed into another prime (39654899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19827444 + 19827445.

It is an arithmetic number, because the mean of its divisors is an integer number (19827445).

Almost surely, 2^39654889 is an apocalyptic number.

It is an amenable number.

39654889 is a deficient number, since it is larger than the sum of its proper divisors (1).

39654889 is an equidigital number, since it uses as much as digits as its factorization.

39654889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 52.

The square root of 39654889 is about 6297.2127961504. The cubic root of 39654889 is about 341.0087945605.

The spelling of 39654889 in words is "thirty-nine million, six hundred fifty-four thousand, eight hundred eighty-nine".