87249393 has 48 divisors (see below), whose sum is σ = 162978816. Its totient is φ = 45314640.

The previous prime is 87249359. The next prime is 87249397. The reversal of 87249393 is 39394278.

It is a happy number.

87249393 is a `hidden beast` number, since 8 + 72 + 493 + 93 = 666.

It is not a de Polignac number, because 87249393 - 2⁶ = 87249329 is a prime.

It is a super-2 number, since 2×87249393² = 15224913157736898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87249397) 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, 16380 + ... + 21042.

It is an arithmetic number, because the mean of its divisors is an integer number (3395392).

Almost surely, 2^87249393 is an apocalyptic number.

It is an amenable number.

87249393 is a deficient number, since it is larger than the sum of its proper divisors (75729423).

87249393 is a wasteful number, since it uses less digits than its factorization.

87249393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696 (or 4684 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 87249393 is about 9340.7383541131. The cubic root of 87249393 is about 443.5277575754.

The spelling of 87249393 in words is "eighty-seven million, two hundred forty-nine thousand, three hundred ninety-three".