697949918 has 8 divisors (see below), whose sum is σ = 1047779040. Its totient is φ = 348690240.

The previous prime is 697949897. The next prime is 697950023. The reversal of 697949918 is 819949796.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139283 + ... + 144206.

It is an arithmetic number, because the mean of its divisors is an integer number (130972380).

Almost surely, 2^697949918 is an apocalyptic number.

697949918 is a deficient number, since it is larger than the sum of its proper divisors (349829122).

697949918 is a wasteful number, since it uses less digits than its factorization.

697949918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284722.

The product of its digits is 8817984, while the sum is 62.

The square root of 697949918 is about 26418.7417944156. The cubic root of 697949918 is about 887.0363560684.

The spelling of 697949918 in words is "six hundred ninety-seven million, nine hundred forty-nine thousand, nine hundred eighteen".