6396917437 has 4 divisors (see below), whose sum is σ = 6773206716. Its totient is φ = 6020628160.

The previous prime is 6396917413. The next prime is 6396917441. The reversal of 6396917437 is 7347196936.

It is a happy number.

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 3039757956 + 3357159481 = 55134^2 + 57941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6396917437 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 (6396987437) 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, 188144614 + ... + 188144647.

It is an arithmetic number, because the mean of its divisors is an integer number (1693301679).

Almost surely, 2^6396917437 is an apocalyptic number.

It is an amenable number.

6396917437 is a deficient number, since it is larger than the sum of its proper divisors (376289279).

6396917437 is a wasteful number, since it uses less digits than its factorization.

6396917437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376289278.

The product of its digits is 5143824, while the sum is 55.

The square root of 6396917437 is about 79980.7316608194. The cubic root of 6396917437 is about 1856.3374024500.

It can be divided in two parts, 63969 and 17437, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 6396917437 in words is "six billion, three hundred ninety-six million, nine hundred seventeen thousand, four hundred thirty-seven".