772070891 has 4 divisors (see below), whose sum is σ = 790026072. Its totient is φ = 754115712.

The previous prime is 772070869. The next prime is 772070899. The reversal of 772070891 is 198070277.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772070891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772070899) 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, 8977526 + ... + 8977611.

It is an arithmetic number, because the mean of its divisors is an integer number (197506518).

Almost surely, 2^772070891 is an apocalyptic number.

772070891 is a deficient number, since it is larger than the sum of its proper divisors (17955181).

772070891 is a wasteful number, since it uses less digits than its factorization.

772070891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17955180.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 772070891 is about 27786.1636610742. The cubic root of 772070891 is about 917.3866014721.

The spelling of 772070891 in words is "seven hundred seventy-two million, seventy thousand, eight hundred ninety-one".