3990378073 has 4 divisors (see below), whose sum is σ = 4353139728. Its totient is φ = 3627616420.

The previous prime is 3990378059. The next prime is 3990378079. The reversal of 3990378073 is 3708730993.

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 3990378073 - 2²⁵ = 3956823641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990378079) 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, 181380811 + ... + 181380832.

It is an arithmetic number, because the mean of its divisors is an integer number (1088284932).

Almost surely, 2^3990378073 is an apocalyptic number.

It is an amenable number.

3990378073 is a deficient number, since it is larger than the sum of its proper divisors (362761655).

3990378073 is a wasteful number, since it uses less digits than its factorization.

3990378073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362761654.

The product of its (nonzero) digits is 857304, while the sum is 49.

The square root of 3990378073 is about 63169.4393912120. The cubic root of 3990378073 is about 1586.1272085991.

The spelling of 3990378073 in words is "three billion, nine hundred ninety million, three hundred seventy-eight thousand, seventy-three".