87774291 has 12 divisors (see below), whose sum is σ = 138311160. Its totient is φ = 53196480.

The previous prime is 87774283. The next prime is 87774311. The reversal of 87774291 is 19247778.

It is a happy number.

It is not a de Polignac number, because 87774291 - 2³ = 87774283 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (87774391) 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, 443206 + ... + 443403.

It is an arithmetic number, because the mean of its divisors is an integer number (11525930).

Almost surely, 2^87774291 is an apocalyptic number.

87774291 is a deficient number, since it is larger than the sum of its proper divisors (50536869).

87774291 is a wasteful number, since it uses less digits than its factorization.

87774291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886626 (or 886623 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 87774291 is about 9368.7934655429. The cubic root of 87774291 is about 444.4154104622.

The spelling of 87774291 in words is "eighty-seven million, seven hundred seventy-four thousand, two hundred ninety-one".