999999757999997 has 2 divisors, whose sum is σ = 999999757999998. Its totient is φ = 999999757999996.

The previous prime is 999999757999993. The next prime is 999999757999999. The reversal of 999999757999997 is 799999757999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 998828365228516 + 1171392771481 = 31604246^2 + 1082309^2 .

It is a cyclic number.

It is not a de Polignac number, because 999999757999997 - 2² = 999999757999993 is a prime.

Together with 999999757999999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999757999993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999878999998 + 499999878999999.

It is an arithmetic number, because the mean of its divisors is an integer number (499999878999999).

Almost surely, 2^{999999757999997} is an apocalyptic number.

It is an amenable number.

999999757999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999757999997 is an equidigital number, since it uses as much as digits as its factorization.

999999757999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53818517229435, while the sum is 125.

The spelling of 999999757999997 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, seven hundred fifty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-seven".