89742943957 has 2 divisors, whose sum is σ = 89742943958. Its totient is φ = 89742943956.

The previous prime is 89742943943. The next prime is 89742943999. The reversal of 89742943957 is 75934924798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60430422276 + 29312521681 = 245826^2 + 171209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89742943957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89742943892 and 89742943901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89742943907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44871471978 + 44871471979.

It is an arithmetic number, because the mean of its divisors is an integer number (44871471979).

Almost surely, 2^89742943957 is an apocalyptic number.

It is an amenable number.

89742943957 is a deficient number, since it is larger than the sum of its proper divisors (1).

89742943957 is an equidigital number, since it uses as much as digits as its factorization.

89742943957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 67.

The spelling of 89742943957 in words is "eighty-nine billion, seven hundred forty-two million, nine hundred forty-three thousand, nine hundred fifty-seven".