87878767 has 4 divisors (see below), whose sum is σ = 89748576. Its totient is φ = 86008960.

The previous prime is 87878761. The next prime is 87878773. The reversal of 87878767 is 76787878.

87878767 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is an interprime number because it is at equal distance from previous prime (87878761) and next prime (87878773).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87878767 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87878761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934834 + ... + 934927.

It is an arithmetic number, because the mean of its divisors is an integer number (22437144).

Almost surely, 2^87878767 is an apocalyptic number.

87878767 is a deficient number, since it is larger than the sum of its proper divisors (1869809).

87878767 is a wasteful number, since it uses less digits than its factorization.

87878767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869808.

The product of its digits is 7375872, while the sum is 58.

The square root of 87878767 is about 9374.3675520005. The cubic root of 87878767 is about 444.5916668359.

The spelling of 87878767 in words is "eighty-seven million, eight hundred seventy-eight thousand, seven hundred sixty-seven".