4007913891 has 8 divisors (see below), whose sum is σ = 5362124880. Its totient is φ = 2662822752.

The previous prime is 4007913887. The next prime is 4007913947. The reversal of 4007913891 is 1983197004.

It is a happy number.

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

It is not a de Polignac number, because 4007913891 - 2² = 4007913887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4007913821) 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, 2278936 + ... + 2280693.

It is an arithmetic number, because the mean of its divisors is an integer number (670265610).

Almost surely, 2^4007913891 is an apocalyptic number.

4007913891 is a deficient number, since it is larger than the sum of its proper divisors (1354210989).

4007913891 is a wasteful number, since it uses less digits than its factorization.

4007913891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4559925.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 4007913891 is about 63308.0870900393. The cubic root of 4007913891 is about 1588.4472388953.

The spelling of 4007913891 in words is "four billion, seven million, nine hundred thirteen thousand, eight hundred ninety-one".