249394988739 has 8 divisors (see below), whose sum is σ = 358105624912. Its totient is φ = 153473839200.

The previous prime is 249394988707. The next prime is 249394988753. The reversal of 249394988739 is 937889493942.

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

It is not a de Polignac number, because 249394988739 - 2⁵ = 249394988707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249394988639) 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, 3197371612 + ... + 3197371689.

It is an arithmetic number, because the mean of its divisors is an integer number (44763203114).

Almost surely, 2^249394988739 is an apocalyptic number.

249394988739 is a deficient number, since it is larger than the sum of its proper divisors (108710636173).

249394988739 is a wasteful number, since it uses less digits than its factorization.

249394988739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6394743317.

The product of its digits is 846526464, while the sum is 75.

The spelling of 249394988739 in words is "two hundred forty-nine billion, three hundred ninety-four million, nine hundred eighty-eight thousand, seven hundred thirty-nine".