997751711 has 16 divisors (see below), whose sum is σ = 1106784000. Its totient is φ = 891844800.

The previous prime is 997751621. The next prime is 997751717. The reversal of 997751711 is 117157799.

It is not a de Polignac number, because 997751711 - 2²² = 993557407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997751717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325715 + ... + 328763.

It is an arithmetic number, because the mean of its divisors is an integer number (69174000).

Almost surely, 2^997751711 is an apocalyptic number.

997751711 is a deficient number, since it is larger than the sum of its proper divisors (109032289).

997751711 is a wasteful number, since it uses less digits than its factorization.

997751711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550.

The product of its digits is 138915, while the sum is 47.

The square root of 997751711 is about 31587.2080279343. The cubic root of 997751711 is about 999.2500079859.

The spelling of 997751711 in words is "nine hundred ninety-seven million, seven hundred fifty-one thousand, seven hundred eleven".