697806542 has 4 divisors (see below), whose sum is σ = 1046709816. Its totient is φ = 348903270.

The previous prime is 697806539. The next prime is 697806581. The reversal of 697806542 is 245608796.

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

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, 174451634 + ... + 174451637.

It is an arithmetic number, because the mean of its divisors is an integer number (261677454).

Almost surely, 2^697806542 is an apocalyptic number.

697806542 is a deficient number, since it is larger than the sum of its proper divisors (348903274).

697806542 is a wasteful number, since it uses less digits than its factorization.

697806542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348903273.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 697806542 is about 26416.0281268778. The cubic root of 697806542 is about 886.9756122476.

The spelling of 697806542 in words is "six hundred ninety-seven million, eight hundred six thousand, five hundred forty-two".