74385211997 has 2 divisors, whose sum is σ = 74385211998. Its totient is φ = 74385211996.

The previous prime is 74385211987. The next prime is 74385212003. The reversal of 74385211997 is 79911258347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46591654201 + 27793557796 = 215851^2 + 166714^2 .

It is a cyclic number.

It is not a de Polignac number, because 74385211997 - 2²⁸ = 74116776541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74385211987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37192605998 + 37192605999.

It is an arithmetic number, because the mean of its divisors is an integer number (37192605999).

Almost surely, 2^74385211997 is an apocalyptic number.

It is an amenable number.

74385211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

74385211997 is an equidigital number, since it uses as much as digits as its factorization.

74385211997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 56.

The spelling of 74385211997 in words is "seventy-four billion, three hundred eighty-five million, two hundred eleven thousand, nine hundred ninety-seven".