699142698 has 64 divisors (see below), whose sum is σ = 1580342400. Its totient is φ = 229075200.

The previous prime is 699142673. The next prime is 699142711. The reversal of 699142698 is 896241996.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1743298 + ... + 1743698.

It is an arithmetic number, because the mean of its divisors is an integer number (24692850).

Almost surely, 2^699142698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699142698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790171200).

699142698 is an abundant number, since it is smaller than the sum of its proper divisors (881199702).

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

699142698 is a wasteful number, since it uses less digits than its factorization.

699142698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 878 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 699142698 is about 26441.3066621149. The cubic root of 699142698 is about 887.5413765805.

The spelling of 699142698 in words is "six hundred ninety-nine million, one hundred forty-two thousand, six hundred ninety-eight".