87745293 has 12 divisors (see below), whose sum is σ = 126939228. Its totient is φ = 58406400.

The previous prime is 87745223. The next prime is 87745297. The reversal of 87745293 is 39254778.

It can be written as a sum of positive squares in 2 ways, for example, as 87553449 + 191844 = 9357^2 + 438^2 .

It is not a de Polignac number, because 87745293 - 2¹⁷ = 87614221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87745297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1108 + ... + 13293.

It is an arithmetic number, because the mean of its divisors is an integer number (10578269).

Almost surely, 2^87745293 is an apocalyptic number.

It is an amenable number.

87745293 is a deficient number, since it is larger than the sum of its proper divisors (39193935).

87745293 is a wasteful number, since it uses less digits than its factorization.

87745293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15084 (or 15081 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 87745293 is about 9367.2457531550. The cubic root of 87745293 is about 444.3664645527.

The spelling of 87745293 in words is "eighty-seven million, seven hundred forty-five thousand, two hundred ninety-three".