7904152891 has 4 divisors (see below), whose sum is σ = 8012429032. Its totient is φ = 7795876752.

The previous prime is 7904152889. The next prime is 7904152903. The reversal of 7904152891 is 1982514097.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7904152891 - 2¹ = 7904152889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7904152811) 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, 54137961 + ... + 54138106.

It is an arithmetic number, because the mean of its divisors is an integer number (2003107258).

Almost surely, 2^7904152891 is an apocalyptic number.

7904152891 is a deficient number, since it is larger than the sum of its proper divisors (108276141).

7904152891 is a wasteful number, since it uses less digits than its factorization.

7904152891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108276140.

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 7904152891 is about 88905.3029408258. The cubic root of 7904152891 is about 1991.9806287363.

The spelling of 7904152891 in words is "seven billion, nine hundred four million, one hundred fifty-two thousand, eight hundred ninety-one".