7971212345 has 8 divisors (see below), whose sum is σ = 9578333376. Its totient is φ = 6368384176.

The previous prime is 7971212303. The next prime is 7971212369. The reversal of 7971212345 is 5432121797.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7971212345 - 2⁸ = 7971212089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069127 + ... + 1076556.

It is an arithmetic number, because the mean of its divisors is an integer number (1197291672).

Almost surely, 2^7971212345 is an apocalyptic number.

It is an amenable number.

7971212345 is a deficient number, since it is larger than the sum of its proper divisors (1607121031).

7971212345 is a wasteful number, since it uses less digits than its factorization.

7971212345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146431.

The product of its digits is 105840, while the sum is 41.

The square root of 7971212345 is about 89281.6461821801. The cubic root of 7971212345 is about 1997.5981454520.

The spelling of 7971212345 in words is "seven billion, nine hundred seventy-one million, two hundred twelve thousand, three hundred forty-five".