3909730861 has 8 divisors (see below), whose sum is σ = 4047617664. Its totient is φ = 3774123360.

The previous prime is 3909730843. The next prime is 3909730879. The reversal of 3909730861 is 1680379093.

It is an interprime number because it is at equal distance from previous prime (3909730843) and next prime (3909730879).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3909730861 - 2⁵ = 3909730829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909730361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566335 + ... + 573196.

It is an arithmetic number, because the mean of its divisors is an integer number (505952208).

Almost surely, 2^3909730861 is an apocalyptic number.

It is an amenable number.

3909730861 is a deficient number, since it is larger than the sum of its proper divisors (137886803).

3909730861 is a wasteful number, since it uses less digits than its factorization.

3909730861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139651.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 3909730861 is about 62527.8406871691. The cubic root of 3909730861 is about 1575.3689718904.

The spelling of 3909730861 in words is "three billion, nine hundred nine million, seven hundred thirty thousand, eight hundred sixty-one".