70731323 has 4 divisors (see below), whose sum is σ = 76172208. Its totient is φ = 65290440.

The previous prime is 70731301. The next prime is 70731329. The reversal of 70731323 is 32313707.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32313707 = 97 ⋅333131.

It is a cyclic number.

It is not a de Polignac number, because 70731323 - 2¹⁰ = 70730299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70731292 and 70731301.

It is not an unprimeable number, because it can be changed into a prime (70731329) 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, 2720423 + ... + 2720448.

It is an arithmetic number, because the mean of its divisors is an integer number (19043052).

Almost surely, 2^70731323 is an apocalyptic number.

70731323 is a deficient number, since it is larger than the sum of its proper divisors (5440885).

70731323 is a wasteful number, since it uses less digits than its factorization.

70731323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440884.

The product of its (nonzero) digits is 2646, while the sum is 26.

The square root of 70731323 is about 8410.1916149396. The cubic root of 70731323 is about 413.5587942836.

The spelling of 70731323 in words is "seventy million, seven hundred thirty-one thousand, three hundred twenty-three".