1097860491 has 24 divisors (see below), whose sum is σ = 1951753440. Its totient is φ = 579090816.

The previous prime is 1097860487. The next prime is 1097860499. The reversal of 1097860491 is 1940687901.

It is a happy number.

1097860491 is a `hidden beast` number, since 10 + 97 + 8 + 60 + 491 = 666.

It is not a de Polignac number, because 1097860491 - 2² = 1097860487 is a prime.

It is a super-2 number, since 2×1097860491² = 2410595315397522162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1097860499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669426 + ... + 671063.

It is an arithmetic number, because the mean of its divisors is an integer number (81323060).

Almost surely, 2^1097860491 is an apocalyptic number.

1097860491 is a deficient number, since it is larger than the sum of its proper divisors (853892949).

1097860491 is a wasteful number, since it uses less digits than its factorization.

1097860491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340515 (or 1340512 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1097860491 is about 33133.9778927916. The cubic root of 1097860491 is about 1031.6104166551.

The spelling of 1097860491 in words is "one billion, ninety-seven million, eight hundred sixty thousand, four hundred ninety-one".