71992345 has 4 divisors (see below), whose sum is σ = 86390820. Its totient is φ = 57593872.

The previous prime is 71992321. The next prime is 71992379. The reversal of 71992345 is 54329917.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22810176 + 49182169 = 4776^2 + 7013^2 .

It is a cyclic number.

It is not a de Polignac number, because 71992345 - 2⁵ = 71992313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71992298 and 71992307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7199230 + ... + 7199239.

It is an arithmetic number, because the mean of its divisors is an integer number (21597705).

Almost surely, 2^71992345 is an apocalyptic number.

It is an amenable number.

71992345 is a deficient number, since it is larger than the sum of its proper divisors (14398475).

71992345 is a wasteful number, since it uses less digits than its factorization.

71992345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14398474.

The product of its digits is 68040, while the sum is 40.

The square root of 71992345 is about 8484.8302870476. The cubic root of 71992345 is about 416.0020205307.

The spelling of 71992345 in words is "seventy-one million, nine hundred ninety-two thousand, three hundred forty-five".