3942630721 has 8 divisors (see below), whose sum is σ = 4125268224. Its totient is φ = 3760928160.

The previous prime is 3942630709. The next prime is 3942630743. The reversal of 3942630721 is 1270362493.

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

It is a cyclic number.

It is not a de Polignac number, because 3942630721 - 2³¹ = 1795147073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3942630761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225100 + ... + 241981.

It is an arithmetic number, because the mean of its divisors is an integer number (515658528).

Almost surely, 2^3942630721 is an apocalyptic number.

It is an amenable number.

3942630721 is a deficient number, since it is larger than the sum of its proper divisors (182637503).

3942630721 is a wasteful number, since it uses less digits than its factorization.

3942630721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467471.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 3942630721 is about 62790.3712443238. The cubic root of 3942630721 is about 1579.7754742909.

The spelling of 3942630721 in words is "three billion, nine hundred forty-two million, six hundred thirty thousand, seven hundred twenty-one".