39990061 has 4 divisors (see below), whose sum is σ = 40046400. Its totient is φ = 39933724.

The previous prime is 39990019. The next prime is 39990107. The reversal of 39990061 is 16009993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39990061 - 2⁹ = 39989549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39990061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39990011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27091 + ... + 28528.

It is an arithmetic number, because the mean of its divisors is an integer number (10011600).

Almost surely, 2^39990061 is an apocalyptic number.

It is an amenable number.

39990061 is a deficient number, since it is larger than the sum of its proper divisors (56339).

39990061 is an equidigital number, since it uses as much as digits as its factorization.

39990061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56338.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 39990061 is about 6323.7695245795. The cubic root of 39990061 is about 341.9668612374.

The spelling of 39990061 in words is "thirty-nine million, nine hundred ninety thousand, sixty-one".