1097191438 has 12 divisors (see below), whose sum is σ = 1914487272. Its totient is φ = 470224860.

The previous prime is 1097191427. The next prime is 1097191507. The reversal of 1097191438 is 8341917901.

It is a junction number, because it is equal to n+sod(n) for n = 1097191394 and 1097191403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5597818 + ... + 5598013.

It is an arithmetic number, because the mean of its divisors is an integer number (159540606).

Almost surely, 2^1097191438 is an apocalyptic number.

1097191438 is a deficient number, since it is larger than the sum of its proper divisors (817295834).

1097191438 is a wasteful number, since it uses less digits than its factorization.

1097191438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11195847 (or 11195840 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1097191438 is about 33123.8801772981. The cubic root of 1097191438 is about 1031.4008143411.

The spelling of 1097191438 in words is "one billion, ninety-seven million, one hundred ninety-one thousand, four hundred thirty-eight".