971693542 has 4 divisors (see below), whose sum is σ = 1457540316. Its totient is φ = 485846770.

The previous prime is 971693537. The next prime is 971693551. The reversal of 971693542 is 245396179.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 971693492 and 971693501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242923384 + ... + 242923387.

It is an arithmetic number, because the mean of its divisors is an integer number (364385079).

Almost surely, 2^971693542 is an apocalyptic number.

971693542 is a deficient number, since it is larger than the sum of its proper divisors (485846774).

971693542 is a wasteful number, since it uses less digits than its factorization.

971693542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485846773.

The product of its digits is 408240, while the sum is 46.

The square root of 971693542 is about 31171.9993263185. Note that the first 3 decimals coincide. The cubic root of 971693542 is about 990.4740585793.

The spelling of 971693542 in words is "nine hundred seventy-one million, six hundred ninety-three thousand, five hundred forty-two".