70722811 has 4 divisors (see below), whose sum is σ = 73004224. Its totient is φ = 68441400.

The previous prime is 70722791. The next prime is 70722833. The reversal of 70722811 is 11822707.

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 70722811 - 2⁵ = 70722779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70722811.

It is not an unprimeable number, because it can be changed into a prime (70726811) 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, 1140660 + ... + 1140721.

It is an arithmetic number, because the mean of its divisors is an integer number (18251056).

Almost surely, 2^70722811 is an apocalyptic number.

70722811 is a deficient number, since it is larger than the sum of its proper divisors (2281413).

70722811 is a wasteful number, since it uses less digits than its factorization.

70722811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281412.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 70722811 is about 8409.6855470344. The cubic root of 70722811 is about 413.5422040209.

It can be divided in two parts, 70 and 722811, that multiplied together give a triangular number (50596770 = T₁₀₀₅₉).

The spelling of 70722811 in words is "seventy million, seven hundred twenty-two thousand, eight hundred eleven".