39432989 has 2 divisors, whose sum is σ = 39432990. Its totient is φ = 39432988.

The previous prime is 39432983. The next prime is 39432997. The reversal of 39432989 is 98923493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39000025 + 432964 = 6245^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 39432989 - 2⁴ = 39432973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39432983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19716494 + 19716495.

It is an arithmetic number, because the mean of its divisors is an integer number (19716495).

Almost surely, 2^39432989 is an apocalyptic number.

It is an amenable number.

39432989 is a deficient number, since it is larger than the sum of its proper divisors (1).

39432989 is an equidigital number, since it uses as much as digits as its factorization.

39432989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 39432989 is about 6279.5691731201. The cubic root of 39432989 is about 340.3715344582.

The spelling of 39432989 in words is "thirty-nine million, four hundred thirty-two thousand, nine hundred eighty-nine".