1097945138 has 8 divisors (see below), whose sum is σ = 1677991788. Its totient is φ = 538614544.

The previous prime is 1097945131. The next prime is 1097945143. The reversal of 1097945138 is 8315497901.

It can be written as a sum of positive squares in 2 ways, for example, as 1008888169 + 89056969 = 31763^2 + 9437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1097945092 and 1097945101.

It is not an unprimeable number, because it can be changed into a prime (1097945131) 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 3 ways as a sum of consecutive naturals, for example, 5178881 + ... + 5179092.

Almost surely, 2^1097945138 is an apocalyptic number.

1097945138 is a deficient number, since it is larger than the sum of its proper divisors (580046650).

1097945138 is a wasteful number, since it uses less digits than its factorization.

1097945138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10358028.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1097945138 is about 33135.2552125376. The cubic root of 1097945138 is about 1031.6369289742.

The spelling of 1097945138 in words is "one billion, ninety-seven million, nine hundred forty-five thousand, one hundred thirty-eight".