997773901499 has 2 divisors, whose sum is σ = 997773901500. Its totient is φ = 997773901498.

The previous prime is 997773901489. The next prime is 997773901513. The reversal of 997773901499 is 994109377799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997773901499 - 2⁴ = 997773901483 is a prime.

It is not a weakly prime, because it can be changed into another prime (997773901489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498886950749 + 498886950750.

It is an arithmetic number, because the mean of its divisors is an integer number (498886950750).

Almost surely, 2^997773901499 is an apocalyptic number.

997773901499 is a deficient number, since it is larger than the sum of its proper divisors (1).

997773901499 is an equidigital number, since it uses as much as digits as its factorization.

997773901499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243045684, while the sum is 74.

The spelling of 997773901499 in words is "nine hundred ninety-seven billion, seven hundred seventy-three million, nine hundred one thousand, four hundred ninety-nine".