842097538 has 4 divisors (see below), whose sum is σ = 1263146310. Its totient is φ = 421048768.

The previous prime is 842097523. The next prime is 842097539. The reversal of 842097538 is 835790248.

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., 546016689 + 296080849 = 23367^2 + 17207^2 .

It is a super-2 number, since 2×842097538² = 1418256527011322888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (842097539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210524383 + ... + 210524386.

Almost surely, 2^842097538 is an apocalyptic number.

842097538 is a deficient number, since it is larger than the sum of its proper divisors (421048772).

842097538 is a wasteful number, since it uses less digits than its factorization.

842097538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421048771.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 842097538 is about 29018.9168991539. The cubic root of 842097538 is about 944.3235037765.

The spelling of 842097538 in words is "eight hundred forty-two million, ninety-seven thousand, five hundred thirty-eight".