7898436997 has 16 divisors (see below), whose sum is σ = 9317452032. Its totient is φ = 6614225920.

The previous prime is 7898436977. The next prime is 7898437003. The reversal of 7898436997 is 7996348987.

It is a cyclic number.

It is not a de Polignac number, because 7898436997 - 2¹⁵ = 7898404229 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 (7898436907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440548 + ... + 458125.

It is an arithmetic number, because the mean of its divisors is an integer number (582340752).

Almost surely, 2^7898436997 is an apocalyptic number.

It is an amenable number.

7898436997 is a deficient number, since it is larger than the sum of its proper divisors (1419015035).

7898436997 is a wasteful number, since it uses less digits than its factorization.

7898436997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898748.

The product of its digits is 164602368, while the sum is 70.

The square root of 7898436997 is about 88873.1511593912. The cubic root of 7898436997 is about 1991.5003455244.

The spelling of 7898436997 in words is "seven billion, eight hundred ninety-eight million, four hundred thirty-six thousand, nine hundred ninety-seven".