1699999956 has 18 divisors (see below), whose sum is σ = 4297222202. Its totient is φ = 566666640.

The previous prime is 1699999927. The next prime is 1699999991. The reversal of 1699999956 is 6599999961.

It can be written as a sum of positive squares in only one way, i.e., 1630544400 + 69455556 = 40380^2 + 8334^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23611075 + ... + 23611146.

Almost surely, 2^1699999956 is an apocalyptic number.

It is an amenable number.

1699999956 is an abundant number, since it is smaller than the sum of its proper divisors (2597222246).

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

1699999956 is a wasteful number, since it uses less digits than its factorization.

1699999956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47222231 (or 47222226 counting only the distinct ones).

The product of its digits is 95659380, while the sum is 72.

The square root of 1699999956 is about 41231.0557225982. The cubic root of 1699999956 is about 1193.4831816306.

The spelling of 1699999956 in words is "one billion, six hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-six".