89774397547 has 2 divisors, whose sum is σ = 89774397548. Its totient is φ = 89774397546.

The previous prime is 89774397509. The next prime is 89774397569. The reversal of 89774397547 is 74579347798.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89774397547 is a prime.

It is not a weakly prime, because it can be changed into another prime (89774391547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44887198773 + 44887198774.

It is an arithmetic number, because the mean of its divisors is an integer number (44887198774).

Almost surely, 2^89774397547 is an apocalyptic number.

89774397547 is a deficient number, since it is larger than the sum of its proper divisors (1).

89774397547 is an equidigital number, since it uses as much as digits as its factorization.

89774397547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373403520, while the sum is 70.

The spelling of 89774397547 in words is "eighty-nine billion, seven hundred seventy-four million, three hundred ninety-seven thousand, five hundred forty-seven".