87118747 has 2 divisors, whose sum is σ = 87118748. Its totient is φ = 87118746.

The previous prime is 87118663. The next prime is 87118753. The reversal of 87118747 is 74781178.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87118747 is a prime.

It is not a weakly prime, because it can be changed into another prime (87118147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43559373 + 43559374.

It is an arithmetic number, because the mean of its divisors is an integer number (43559374).

Almost surely, 2^87118747 is an apocalyptic number.

87118747 is a deficient number, since it is larger than the sum of its proper divisors (1).

87118747 is an equidigital number, since it uses as much as digits as its factorization.

87118747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87808, while the sum is 43.

The square root of 87118747 is about 9333.7423898456. The cubic root of 87118747 is about 443.3062696025.

The spelling of 87118747 in words is "eighty-seven million, one hundred eighteen thousand, seven hundred forty-seven".