70811087 has 4 divisors (see below), whose sum is σ = 71460840. Its totient is φ = 70161336.

The previous prime is 70811077. The next prime is 70811101. The reversal of 70811087 is 78011807.

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 70811087 - 2⁴ = 70811071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70811017) 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, 324713 + ... + 324930.

It is an arithmetic number, because the mean of its divisors is an integer number (17865210).

Almost surely, 2^70811087 is an apocalyptic number.

70811087 is a deficient number, since it is larger than the sum of its proper divisors (649753).

70811087 is a wasteful number, since it uses less digits than its factorization.

70811087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649752.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 70811087 is about 8414.9323823784. The cubic root of 70811087 is about 413.7141931938.

The spelling of 70811087 in words is "seventy million, eight hundred eleven thousand, eighty-seven".