39450989 has 2 divisors, whose sum is σ = 39450990. Its totient is φ = 39450988.

The previous prime is 39450959. The next prime is 39451019. The reversal of 39450989 is 98905493.

It is a balanced prime because it is at equal distance from previous prime (39450959) and next prime (39451019).

It can be written as a sum of positive squares in only one way, i.e., 24108100 + 15342889 = 4910^2 + 3917^2 .

It is a cyclic number.

It is not a de Polignac number, because 39450989 - 2²⁴ = 22673773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39450959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19725494 + 19725495.

It is an arithmetic number, because the mean of its divisors is an integer number (19725495).

Almost surely, 2^39450989 is an apocalyptic number.

It is an amenable number.

39450989 is a deficient number, since it is larger than the sum of its proper divisors (1).

39450989 is an equidigital number, since it uses as much as digits as its factorization.

39450989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 39450989 is about 6281.0022289440. The cubic root of 39450989 is about 340.4233164458.

It can be divided in two parts, 39 and 450989, that multiplied together give a palindrome (17588571).

The spelling of 39450989 in words is "thirty-nine million, four hundred fifty thousand, nine hundred eighty-nine".