697890838 has 4 divisors (see below), whose sum is σ = 1046836260. Its totient is φ = 348945418.

The previous prime is 697890799. The next prime is 697890839. The reversal of 697890838 is 838098796.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697890839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174472708 + ... + 174472711.

It is an arithmetic number, because the mean of its divisors is an integer number (261709065).

Almost surely, 2^697890838 is an apocalyptic number.

697890838 is a deficient number, since it is larger than the sum of its proper divisors (348945422).

697890838 is a wasteful number, since it uses less digits than its factorization.

697890838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348945421.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 697890838 is about 26417.6236251484. The cubic root of 697890838 is about 887.0113267717.

The spelling of 697890838 in words is "six hundred ninety-seven million, eight hundred ninety thousand, eight hundred thirty-eight".