6397291739 has 4 divisors (see below), whose sum is σ = 6423836760. Its totient is φ = 6370746720.

The previous prime is 6397291721. The next prime is 6397291753. The reversal of 6397291739 is 9371927936.

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

It is a cyclic number.

It is not a de Polignac number, because 6397291739 - 2³² = 2102324443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6397291039) 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, 13272149 + ... + 13272630.

It is an arithmetic number, because the mean of its divisors is an integer number (1605959190).

Almost surely, 2^6397291739 is an apocalyptic number.

6397291739 is a deficient number, since it is larger than the sum of its proper divisors (26545021).

6397291739 is a wasteful number, since it uses less digits than its factorization.

6397291739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26545020.

The product of its digits is 3857868, while the sum is 56.

The square root of 6397291739 is about 79983.0715776782. The cubic root of 6397291739 is about 1856.3736082870.

The spelling of 6397291739 in words is "six billion, three hundred ninety-seven million, two hundred ninety-one thousand, seven hundred thirty-nine".