70781223 has 4 divisors (see below), whose sum is σ = 94374968. Its totient is φ = 47187480.

The previous prime is 70781219. The next prime is 70781233. The reversal of 70781223 is 32218707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32218707 = 3 ⋅10739569.

It is not a de Polignac number, because 70781223 - 2² = 70781219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70781233) 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, 11796868 + ... + 11796873.

It is an arithmetic number, because the mean of its divisors is an integer number (23593742).

Almost surely, 2^70781223 is an apocalyptic number.

70781223 is a deficient number, since it is larger than the sum of its proper divisors (23593745).

70781223 is a wasteful number, since it uses less digits than its factorization.

70781223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23593744.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 70781223 is about 8413.1577306027. The cubic root of 70781223 is about 413.6560248170.

The spelling of 70781223 in words is "seventy million, seven hundred eighty-one thousand, two hundred twenty-three".