1097287905 has 64 divisors (see below), whose sum is σ = 2117928960. Its totient is φ = 473900544.

The previous prime is 1097287901. The next prime is 1097287907. The reversal of 1097287905 is 5097827901.

It is not a de Polignac number, because 1097287905 - 2² = 1097287901 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1097287901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1170597 + ... + 1171533.

It is an arithmetic number, because the mean of its divisors is an integer number (33092640).

Almost surely, 2^1097287905 is an apocalyptic number.

1097287905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1097287905 is a deficient number, since it is larger than the sum of its proper divisors (1020641055).

1097287905 is a wasteful number, since it uses less digits than its factorization.

1097287905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 317520, while the sum is 48.

The square root of 1097287905 is about 33125.3363001797. The cubic root of 1097287905 is about 1031.4310409795.

The spelling of 1097287905 in words is "one billion, ninety-seven million, two hundred eighty-seven thousand, nine hundred five".