87973747 has 4 divisors (see below), whose sum is σ = 89286856. Its totient is φ = 86660640.

The previous prime is 87973709. The next prime is 87973751. The reversal of 87973747 is 74737978.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87973747 - 2²³ = 79585139 is a prime.

It is a super-2 number, since 2×87973747² = 15478760322440018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87973694 and 87973703.

It is not an unprimeable number, because it can be changed into a prime (87973247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656454 + ... + 656587.

It is an arithmetic number, because the mean of its divisors is an integer number (22321714).

Almost surely, 2^87973747 is an apocalyptic number.

87973747 is a deficient number, since it is larger than the sum of its proper divisors (1313109).

87973747 is a wasteful number, since it uses less digits than its factorization.

87973747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313108.

The product of its digits is 2074464, while the sum is 52.

The square root of 87973747 is about 9379.4321256673. The cubic root of 87973747 is about 444.7517817833.

It can be divided in two parts, 8797 and 3747, that added together give a square (12544 = 112²).

The spelling of 87973747 in words is "eighty-seven million, nine hundred seventy-three thousand, seven hundred forty-seven".