87245489 has 4 divisors (see below), whose sum is σ = 89101824. Its totient is φ = 85389156.

The previous prime is 87245461. The next prime is 87245491. The reversal of 87245489 is 98454278.

It is a happy number.

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 87245489 - 2²⁴ = 70468273 is a prime.

It is a super-2 number, since 2×87245489² = 15223550701698242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1856287 = 87245489 / (8 + 7 + 2 + 4 + 5 + 4 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87245419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928097 + ... + 928190.

It is an arithmetic number, because the mean of its divisors is an integer number (22275456).

Almost surely, 2^87245489 is an apocalyptic number.

It is an amenable number.

87245489 is a deficient number, since it is larger than the sum of its proper divisors (1856335).

87245489 is a wasteful number, since it uses less digits than its factorization.

87245489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856334.

The product of its digits is 645120, while the sum is 47.

The square root of 87245489 is about 9340.5293747196. The cubic root of 87245489 is about 443.5211422163.

The spelling of 87245489 in words is "eighty-seven million, two hundred forty-five thousand, four hundred eighty-nine".