1068698138 has 4 divisors (see below), whose sum is σ = 1603047210. Its totient is φ = 534349068.

The previous prime is 1068698129. The next prime is 1068698143. The reversal of 1068698138 is 8318968601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8318968601 = 23 ⋅361694287.

It can be written as a sum of positive squares in only one way, i.e., 642977449 + 425720689 = 25357^2 + 20633^2 .

It is a super-2 number, since 2×1068698138² = 2284231420329334088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267174533 + ... + 267174536.

Almost surely, 2^1068698138 is an apocalyptic number.

1068698138 is a deficient number, since it is larger than the sum of its proper divisors (534349072).

1068698138 is an equidigital number, since it uses as much as digits as its factorization.

1068698138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534349071.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 1068698138 is about 32690.9488696795. The cubic root of 1068698138 is about 1022.3941383659.

The spelling of 1068698138 in words is "one billion, sixty-eight million, six hundred ninety-eight thousand, one hundred thirty-eight".