70811057 has 4 divisors (see below), whose sum is σ = 71971956. Its totient is φ = 69650160.

The previous prime is 70811051. The next prime is 70811063. The reversal of 70811057 is 75011807.

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 (70811051) and next prime (70811063).

It can be written as a sum of positive squares in 2 ways, for example, as 3964081 + 66846976 = 1991^2 + 8176^2 .

It is a cyclic number.

It is not a de Polignac number, because 70811057 - 2⁸ = 70810801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70811051) 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, 580358 + ... + 580479.

It is an arithmetic number, because the mean of its divisors is an integer number (17992989).

Almost surely, 2^70811057 is an apocalyptic number.

It is an amenable number.

70811057 is a deficient number, since it is larger than the sum of its proper divisors (1160899).

70811057 is a wasteful number, since it uses less digits than its factorization.

70811057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160898.

The product of its (nonzero) digits is 1960, while the sum is 29.

The square root of 70811057 is about 8414.9305998327. The cubic root of 70811057 is about 413.7141347687.

The spelling of 70811057 in words is "seventy million, eight hundred eleven thousand, fifty-seven".