39887401 has 2 divisors, whose sum is σ = 39887402. Its totient is φ = 39887400.

The previous prime is 39887387. The next prime is 39887437. The reversal of 39887401 is 10478893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37197801 + 2689600 = 6099^2 + 1640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39887401 is a prime.

It is not a weakly prime, because it can be changed into another prime (39887461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19943700 + 19943701.

It is an arithmetic number, because the mean of its divisors is an integer number (19943701).

Almost surely, 2^39887401 is an apocalyptic number.

It is an amenable number.

39887401 is a deficient number, since it is larger than the sum of its proper divisors (1).

39887401 is an equidigital number, since it uses as much as digits as its factorization.

39887401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 39887401 is about 6315.6473144089. The cubic root of 39887401 is about 341.6739851166.

The spelling of 39887401 in words is "thirty-nine million, eight hundred eighty-seven thousand, four hundred one".