1097774831 has 4 divisors (see below), whose sum is σ = 1098000552. Its totient is φ = 1097549112.

The previous prime is 1097774819. The next prime is 1097774851. The reversal of 1097774831 is 1384777901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1097774831 - 2¹⁸ = 1097512687 is a prime.

It is a super-2 number, since 2×1097774831² = 2410219159154157122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097774801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105401 + ... + 115346.

It is an arithmetic number, because the mean of its divisors is an integer number (274500138).

Almost surely, 2^1097774831 is an apocalyptic number.

1097774831 is a deficient number, since it is larger than the sum of its proper divisors (225721).

1097774831 is an equidigital number, since it uses as much as digits as its factorization.

1097774831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225720.

The product of its (nonzero) digits is 296352, while the sum is 47.

The square root of 1097774831 is about 33132.6852367870. The cubic root of 1097774831 is about 1031.5835856666.

The spelling of 1097774831 in words is "one billion, ninety-seven million, seven hundred seventy-four thousand, eight hundred thirty-one".