70749823 has 4 divisors (see below), whose sum is σ = 71140888. Its totient is φ = 70358760.

The previous prime is 70749803. The next prime is 70749839. The reversal of 70749823 is 32894707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32894707 = 233 ⋅141179.

It is a cyclic number.

It is not a de Polignac number, because 70749823 - 2²⁵ = 37195391 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 (70749803) 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, 195261 + ... + 195622.

It is an arithmetic number, because the mean of its divisors is an integer number (17785222).

Almost surely, 2^70749823 is an apocalyptic number.

70749823 is a deficient number, since it is larger than the sum of its proper divisors (391065).

70749823 is a wasteful number, since it uses less digits than its factorization.

70749823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391064.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 70749823 is about 8411.2913990659. The cubic root of 70749823 is about 413.5948470083.

The spelling of 70749823 in words is "seventy million, seven hundred forty-nine thousand, eight hundred twenty-three".