87947701 has 4 divisors (see below), whose sum is σ = 89438400. Its totient is φ = 86457004.

The previous prime is 87947677. The next prime is 87947729. The reversal of 87947701 is 10774978.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10774978 = 2 ⋅5387489.

It is a cyclic number.

It is not a de Polignac number, because 87947701 - 2²¹ = 85850549 is a prime.

It is a super-2 number, since 2×87947701² = 15469596222370802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87917701) 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, 745261 + ... + 745378.

It is an arithmetic number, because the mean of its divisors is an integer number (22359600).

Almost surely, 2^87947701 is an apocalyptic number.

It is an amenable number.

87947701 is a deficient number, since it is larger than the sum of its proper divisors (1490699).

87947701 is a wasteful number, since it uses less digits than its factorization.

87947701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490698.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 87947701 is about 9378.0435592932. The cubic root of 87947701 is about 444.7078855502.

The spelling of 87947701 in words is "eighty-seven million, nine hundred forty-seven thousand, seven hundred one".