1964712517 has 2 divisors, whose sum is σ = 1964712518. Its totient is φ = 1964712516.

The previous prime is 1964712443. The next prime is 1964712539. The reversal of 1964712517 is 7152174691.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1964173761 + 538756 = 44319^2 + 734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1964712517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964712557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982356258 + 982356259.

It is an arithmetic number, because the mean of its divisors is an integer number (982356259).

Almost surely, 2^1964712517 is an apocalyptic number.

It is an amenable number.

1964712517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964712517 is an equidigital number, since it uses as much as digits as its factorization.

1964712517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The square root of 1964712517 is about 44325.0777438687. The cubic root of 1964712517 is about 1252.4671310347.

The spelling of 1964712517 in words is "one billion, nine hundred sixty-four million, seven hundred twelve thousand, five hundred seventeen".