249493534621 has 4 divisors (see below), whose sum is σ = 249494919552. Its totient is φ = 249492149692.

The previous prime is 249493534613. The next prime is 249493534651. The reversal of 249493534621 is 126435394942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249493534621 - 2³ = 249493534613 is a prime.

It is a super-2 number, since 2×249493534621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249493534651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373165 + ... + 798898.

It is an arithmetic number, because the mean of its divisors is an integer number (62373729888).

Almost surely, 2^249493534621 is an apocalyptic number.

It is an amenable number.

249493534621 is a deficient number, since it is larger than the sum of its proper divisors (1384931).

249493534621 is a wasteful number, since it uses less digits than its factorization.

249493534621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384930.

The product of its digits is 5598720, while the sum is 52.

The spelling of 249493534621 in words is "two hundred forty-nine billion, four hundred ninety-three million, five hundred thirty-four thousand, six hundred twenty-one".