917072154797 has 2 divisors, whose sum is σ = 917072154798. Its totient is φ = 917072154796.

The previous prime is 917072154787. The next prime is 917072154821. The reversal of 917072154797 is 797451270719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844182414436 + 72889740361 = 918794^2 + 269981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-917072154797 is a prime.

It is a super-2 number, since 2×917072154797² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (917072154727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458536077398 + 458536077399.

It is an arithmetic number, because the mean of its divisors is an integer number (458536077399).

Almost surely, 2^917072154797 is an apocalyptic number.

It is an amenable number.

917072154797 is a deficient number, since it is larger than the sum of its proper divisors (1).

917072154797 is an equidigital number, since it uses as much as digits as its factorization.

917072154797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7779240, while the sum is 59.

The spelling of 917072154797 in words is "nine hundred seventeen billion, seventy-two million, one hundred fifty-four thousand, seven hundred ninety-seven".