253998965 has 48 divisors (see below), whose sum is σ = 358525440. Its totient is φ = 172233600.

The previous prime is 253998961. The next prime is 253998967. The reversal of 253998965 is 569899352.

It is not a de Polignac number, because 253998965 - 2² = 253998961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253998965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253998961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 543662 + ... + 544128.

It is an arithmetic number, because the mean of its divisors is an integer number (7469280).

Almost surely, 2^253998965 is an apocalyptic number.

It is an amenable number.

253998965 is a deficient number, since it is larger than the sum of its proper divisors (104526475).

253998965 is a wasteful number, since it uses less digits than its factorization.

253998965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 543 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 56.

The square root of 253998965 is about 15937.3449796382. The cubic root of 253998965 is about 633.3016929407.

The spelling of 253998965 in words is "two hundred fifty-three million, nine hundred ninety-eight thousand, nine hundred sixty-five".