197042579 has 4 divisors (see below), whose sum is σ = 198480984. Its totient is φ = 195604176.

The previous prime is 197042569. The next prime is 197042591. The reversal of 197042579 is 975240791.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197042579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197042509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718997 + ... + 719270.

It is an arithmetic number, because the mean of its divisors is an integer number (49620246).

Almost surely, 2^197042579 is an apocalyptic number.

197042579 is a deficient number, since it is larger than the sum of its proper divisors (1438405).

197042579 is a wasteful number, since it uses less digits than its factorization.

197042579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438404.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 197042579 is about 14037.1855797378. The cubic root of 197042579 is about 581.9067045771.

The spelling of 197042579 in words is "one hundred ninety-seven million, forty-two thousand, five hundred seventy-nine".