997771457 has 8 divisors (see below), whose sum is σ = 1000843584. Its totient is φ = 994705488.

The previous prime is 997771433. The next prime is 997771483. The reversal of 997771457 is 754177799.

997771457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 997771457 - 2¹⁶ = 997705921 is a prime.

It is a pancake number, because a pancake can be divided into 997771457 parts by 44671 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997771417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726023 + ... + 727395.

It is an arithmetic number, because the mean of its divisors is an integer number (125105448).

Almost surely, 2^997771457 is an apocalyptic number.

It is an amenable number.

997771457 is a deficient number, since it is larger than the sum of its proper divisors (3072127).

997771457 is a wasteful number, since it uses less digits than its factorization.

997771457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079.

The product of its digits is 3889620, while the sum is 56.

The square root of 997771457 is about 31587.5205896253. The cubic root of 997771457 is about 999.2565998265.

The spelling of 997771457 in words is "nine hundred ninety-seven million, seven hundred seventy-one thousand, four hundred fifty-seven".