87621682 has 4 divisors (see below), whose sum is σ = 131432526. Its totient is φ = 43810840.

The previous prime is 87621649. The next prime is 87621683. The reversal of 87621682 is 28612678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28612678 = 2 ⋅14306339.

It can be written as a sum of positive squares in only one way, i.e., 49688401 + 37933281 = 7049^2 + 6159^2 .

It is not an unprimeable number, because it can be changed into a prime (87621683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21905419 + ... + 21905422.

Almost surely, 2^87621682 is an apocalyptic number.

87621682 is a deficient number, since it is larger than the sum of its proper divisors (43810844).

87621682 is a wasteful number, since it uses less digits than its factorization.

87621682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43810843.

The product of its digits is 64512, while the sum is 40.

The square root of 87621682 is about 9360.6453837329. The cubic root of 87621682 is about 444.1576997104.

The spelling of 87621682 in words is "eighty-seven million, six hundred twenty-one thousand, six hundred eighty-two".