249969481397 has 8 divisors (see below), whose sum is σ = 264683022912. Its totient is φ = 235256990400.

The previous prime is 249969481393. The next prime is 249969481403. The reversal of 249969481397 is 793184969942.

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 249969481397 - 2² = 249969481393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249969481397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249969481393) 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, 256622 + ... + 752192.

It is an arithmetic number, because the mean of its divisors is an integer number (33085377864).

Almost surely, 2^249969481397 is an apocalyptic number.

It is an amenable number.

249969481397 is a deficient number, since it is larger than the sum of its proper divisors (14713541515).

249969481397 is a wasteful number, since it uses less digits than its factorization.

249969481397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525259.

The product of its digits is 211631616, while the sum is 71.

The spelling of 249969481397 in words is "two hundred forty-nine billion, nine hundred sixty-nine million, four hundred eighty-one thousand, three hundred ninety-seven".