39881461 has 2 divisors, whose sum is σ = 39881462. Its totient is φ = 39881460.

The previous prime is 39881459. The next prime is 39881477. The reversal of 39881461 is 16418893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 3218436 = 6055^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 39881461 - 2¹ = 39881459 is a prime.

Together with 39881459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39881441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19940730 + 19940731.

It is an arithmetic number, because the mean of its divisors is an integer number (19940731).

Almost surely, 2^39881461 is an apocalyptic number.

It is an amenable number.

39881461 is a deficient number, since it is larger than the sum of its proper divisors (1).

39881461 is an equidigital number, since it uses as much as digits as its factorization.

39881461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 39881461 is about 6315.1770363150. The cubic root of 39881461 is about 341.6570236686.

The spelling of 39881461 in words is "thirty-nine million, eight hundred eighty-one thousand, four hundred sixty-one".