87049821 has 8 divisors (see below), whose sum is σ = 116112960. Its totient is φ = 58009952.

The previous prime is 87049813. The next prime is 87049841. The reversal of 87049821 is 12894078.

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

It is a cyclic number.

It is not a de Polignac number, because 87049821 - 2³ = 87049813 is a prime.

It is a super-2 number, since 2×87049821² = 15155342672264082, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87049821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87049801) 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, 6865 + ... + 14873.

It is an arithmetic number, because the mean of its divisors is an integer number (14514120).

Almost surely, 2^87049821 is an apocalyptic number.

It is an amenable number.

87049821 is a deficient number, since it is larger than the sum of its proper divisors (29063139).

87049821 is a wasteful number, since it uses less digits than its factorization.

87049821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11635.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 87049821 is about 9330.0493567826. The cubic root of 87049821 is about 443.1893281070.

The spelling of 87049821 in words is "eighty-seven million, forty-nine thousand, eight hundred twenty-one".