89742943997 has 6 divisors (see below), whose sum is σ = 104394853278. Its totient is φ = 76922523384.

The previous prime is 89742943957. The next prime is 89742943999. The reversal of 89742943997 is 79934924798.

It can be written as a sum of positive squares in only one way, i.e., 89332840996 + 410103001 = 298886^2 + 20251^2 .

It is not a de Polignac number, because 89742943997 - 2³⁰ = 88669202173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89742943997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89742943999) 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, 915744278 + ... + 915744375.

It is an arithmetic number, because the mean of its divisors is an integer number (17399142213).

Almost surely, 2^89742943997 is an apocalyptic number.

It is an amenable number.

89742943997 is a deficient number, since it is larger than the sum of its proper divisors (14651909281).

89742943997 is a wasteful number, since it uses less digits than its factorization.

89742943997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831488667 (or 1831488660 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 71.

The spelling of 89742943997 in words is "eighty-nine billion, seven hundred forty-two million, nine hundred forty-three thousand, nine hundred ninety-seven".