70936891 has 2 divisors, whose sum is σ = 70936892. Its totient is φ = 70936890.

The previous prime is 70936829. The next prime is 70936919. The reversal of 70936891 is 19863907.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70936891 - 2¹⁵ = 70904123 is a prime.

It is not a weakly prime, because it can be changed into another prime (70931891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35468445 + 35468446.

It is an arithmetic number, because the mean of its divisors is an integer number (35468446).

Almost surely, 2^70936891 is an apocalyptic number.

70936891 is a deficient number, since it is larger than the sum of its proper divisors (1).

70936891 is an equidigital number, since it uses as much as digits as its factorization.

70936891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 70936891 is about 8422.4041104663. The cubic root of 70936891 is about 413.9590517817.

The spelling of 70936891 in words is "seventy million, nine hundred thirty-six thousand, eight hundred ninety-one".