2391749894 has 4 divisors (see below), whose sum is σ = 3587624844. Its totient is φ = 1195874946.

The previous prime is 2391749891. The next prime is 2391749903. The reversal of 2391749894 is 4989471932.

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

It is a super-2 number, since 2×2391749894² = 11440935110898022472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391749891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597937472 + ... + 597937475.

It is an arithmetic number, because the mean of its divisors is an integer number (896906211).

Almost surely, 2^2391749894 is an apocalyptic number.

2391749894 is a deficient number, since it is larger than the sum of its proper divisors (1195874950).

2391749894 is a wasteful number, since it uses less digits than its factorization.

2391749894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195874949.

The product of its digits is 3919104, while the sum is 56.

The square root of 2391749894 is about 48905.5200769811. The cubic root of 2391749894 is about 1337.3300020234.

The spelling of 2391749894 in words is "two billion, three hundred ninety-one million, seven hundred forty-nine thousand, eight hundred ninety-four".