87641458 has 4 divisors (see below), whose sum is σ = 131462190. Its totient is φ = 43820728.

The previous prime is 87641441. The next prime is 87641479. The reversal of 87641458 is 85414678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85414678 = 2 ⋅42707339.

It can be written as a sum of positive squares in only one way, i.e., 83850649 + 3790809 = 9157^2 + 1947^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21910363 + ... + 21910366.

Almost surely, 2^87641458 is an apocalyptic number.

87641458 is a deficient number, since it is larger than the sum of its proper divisors (43820732).

87641458 is a wasteful number, since it uses less digits than its factorization.

87641458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43820731.

The product of its digits is 215040, while the sum is 43.

The square root of 87641458 is about 9361.7016615570. The cubic root of 87641458 is about 444.1911123001.

The spelling of 87641458 in words is "eighty-seven million, six hundred forty-one thousand, four hundred fifty-eight".