697734138 has 8 divisors (see below), whose sum is σ = 1395468288. Its totient is φ = 232578044.

The previous prime is 697734109. The next prime is 697734157. The reversal of 697734138 is 831437796.

It is a sphenic number, since it is the product of 3 distinct primes.

697734138 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58144506 + ... + 58144517.

It is an arithmetic number, because the mean of its divisors is an integer number (174433536).

Almost surely, 2^697734138 is an apocalyptic number.

697734138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697734138 is a wasteful number, since it uses less digits than its factorization.

697734138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116289028.

The product of its digits is 762048, while the sum is 48.

The square root of 697734138 is about 26414.6576354872. The cubic root of 697734138 is about 886.9449338291.

The spelling of 697734138 in words is "six hundred ninety-seven million, seven hundred thirty-four thousand, one hundred thirty-eight".