87022491 has 8 divisors (see below), whose sum is σ = 116113680. Its totient is φ = 57973152.

The previous prime is 87022469. The next prime is 87022511. The reversal of 87022491 is 19422078.

It is a happy number.

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

It is not a de Polignac number, because 87022491 - 2¹³ = 87014299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87022421) 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, 5236 + ... + 14193.

It is an arithmetic number, because the mean of its divisors is an integer number (14514210).

Almost surely, 2^87022491 is an apocalyptic number.

87022491 is a deficient number, since it is larger than the sum of its proper divisors (29091189).

87022491 is a wasteful number, since it uses less digits than its factorization.

87022491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20925.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 87022491 is about 9328.5846193300. The cubic root of 87022491 is about 443.1429422864.

The spelling of 87022491 in words is "eighty-seven million, twenty-two thousand, four hundred ninety-one".