70643822 has 4 divisors (see below), whose sum is σ = 105965736. Its totient is φ = 35321910.

The previous prime is 70643821. The next prime is 70643849. The reversal of 70643822 is 22834607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22834607 = 23 ⋅992809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70643821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17660954 + ... + 17660957.

It is an arithmetic number, because the mean of its divisors is an integer number (26491434).

Almost surely, 2^70643822 is an apocalyptic number.

70643822 is a deficient number, since it is larger than the sum of its proper divisors (35321914).

70643822 is a wasteful number, since it uses less digits than its factorization.

70643822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35321913.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 70643822 is about 8404.9879238462. The cubic root of 70643822 is about 413.3881874534.

The spelling of 70643822 in words is "seventy million, six hundred forty-three thousand, eight hundred twenty-two".