1097391590 has 16 divisors (see below), whose sum is σ = 1992787488. Its totient is φ = 435071616.

The previous prime is 1097391583. The next prime is 1097391619. The reversal of 1097391590 is 951937901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484442 + ... + 486701.

It is an arithmetic number, because the mean of its divisors is an integer number (124549218).

Almost surely, 2^1097391590 is an apocalyptic number.

1097391590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1097391590 is a deficient number, since it is larger than the sum of its proper divisors (895395898).

1097391590 is a wasteful number, since it uses less digits than its factorization.

1097391590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971263.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 1097391590 is about 33126.9013039252. The cubic root of 1097391590 is about 1031.4635273059.

The spelling of 1097391590 in words is "one billion, ninety-seven million, three hundred ninety-one thousand, five hundred ninety".