971604493 has 2 divisors, whose sum is σ = 971604494. Its totient is φ = 971604492.

The previous prime is 971604461. The next prime is 971604499. The reversal of 971604493 is 394406179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 954933604 + 16670889 = 30902^2 + 4083^2 .

It is an emirp because it is prime and its reverse (394406179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971604493 - 2⁵ = 971604461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971604499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485802246 + 485802247.

It is an arithmetic number, because the mean of its divisors is an integer number (485802247).

Almost surely, 2^971604493 is an apocalyptic number.

It is an amenable number.

971604493 is a deficient number, since it is larger than the sum of its proper divisors (1).

971604493 is an equidigital number, since it uses as much as digits as its factorization.

971604493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 971604493 is about 31170.5709444020. The cubic root of 971604493 is about 990.4438009535.

The spelling of 971604493 in words is "nine hundred seventy-one million, six hundred four thousand, four hundred ninety-three".