7865989497 has 6 divisors (see below), whose sum is σ = 11361984842. Its totient is φ = 5243992992.

The previous prime is 7865989463. The next prime is 7865989519. The reversal of 7865989497 is 7949895687.

7865989497 is a `hidden beast` number, since 7 + 8 + 6 + 59 + 89 + 497 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7306146576 + 559842921 = 85476^2 + 23661^2 .

It is not a de Polignac number, because 7865989497 - 2¹¹ = 7865987449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7865989447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 436999408 + ... + 436999425.

Almost surely, 2^7865989497 is an apocalyptic number.

It is an amenable number.

7865989497 is a deficient number, since it is larger than the sum of its proper divisors (3495995345).

7865989497 is a wasteful number, since it uses less digits than its factorization.

7865989497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873998839 (or 873998836 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The square root of 7865989497 is about 88690.4137830014. The cubic root of 7865989497 is about 1988.7695142138.

The spelling of 7865989497 in words is "seven billion, eight hundred sixty-five million, nine hundred eighty-nine thousand, four hundred ninety-seven".