87074947 has 2 divisors, whose sum is σ = 87074948. Its totient is φ = 87074946.

The previous prime is 87074921. The next prime is 87074959. The reversal of 87074947 is 74947078.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87074947 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 87074897 and 87074906.

It is not a weakly prime, because it can be changed into another prime (87074747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43537473 + 43537474.

It is an arithmetic number, because the mean of its divisors is an integer number (43537474).

Almost surely, 2^87074947 is an apocalyptic number.

87074947 is a deficient number, since it is larger than the sum of its proper divisors (1).

87074947 is an equidigital number, since it uses as much as digits as its factorization.

87074947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 87074947 is about 9331.3957691226. The cubic root of 87074947 is about 443.2319646253.

The spelling of 87074947 in words is "eighty-seven million, seventy-four thousand, nine hundred forty-seven".