849101138 has 4 divisors (see below), whose sum is σ = 1273651710. Its totient is φ = 424550568.

The previous prime is 849101137. The next prime is 849101147. The reversal of 849101138 is 831101948.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 524272609 + 324828529 = 22897^2 + 18023^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 849101098 and 849101107.

It is not an unprimeable number, because it can be changed into a prime (849101131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212275283 + ... + 212275286.

Almost surely, 2^849101138 is an apocalyptic number.

849101138 is a deficient number, since it is larger than the sum of its proper divisors (424550572).

849101138 is a wasteful number, since it uses less digits than its factorization.

849101138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424550571.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 849101138 is about 29139.3400405706. The cubic root of 849101138 is about 946.9342121917.

The spelling of 849101138 in words is "eight hundred forty-nine million, one hundred one thousand, one hundred thirty-eight".