24897981 has 8 divisors (see below), whose sum is σ = 33224224. Its totient is φ = 16585200.

The previous prime is 24897973. The next prime is 24898021. The reversal of 24897981 is 18979842.

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

It is not a de Polignac number, because 24897981 - 2³ = 24897973 is a prime.

It is a super-2 number, since 2×24897981² = 1239818915752722, which contains 22 as substring.

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 24897981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24897181) 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, 2331 + ... + 7431.

It is an arithmetic number, because the mean of its divisors is an integer number (4153028).

Almost surely, 2^24897981 is an apocalyptic number.

It is an amenable number.

24897981 is a deficient number, since it is larger than the sum of its proper divisors (8326243).

24897981 is a wasteful number, since it uses less digits than its factorization.

24897981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6731.

The product of its digits is 290304, while the sum is 48.

The square root of 24897981 is about 4989.7876708333. The cubic root of 24897981 is about 292.0034910760.

It can be divided in two parts, 24897 and 981, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 24897981 in words is "twenty-four million, eight hundred ninety-seven thousand, nine hundred eighty-one".