698879747 has 4 divisors (see below), whose sum is σ = 709310856. Its totient is φ = 688448640.

The previous prime is 698879743. The next prime is 698879789. The reversal of 698879747 is 747978896.

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

It is a cyclic number.

It is not a de Polignac number, because 698879747 - 2² = 698879743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698879743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5215454 + ... + 5215587.

It is an arithmetic number, because the mean of its divisors is an integer number (177327714).

Almost surely, 2^698879747 is an apocalyptic number.

698879747 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

698879747 is a deficient number, since it is larger than the sum of its proper divisors (10431109).

698879747 is a wasteful number, since it uses less digits than its factorization.

698879747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431108.

The product of its digits is 42674688, while the sum is 65.

The square root of 698879747 is about 26436.3338418927. Note that the first 3 decimals coincide. The cubic root of 698879747 is about 887.4300930720.

The spelling of 698879747 in words is "six hundred ninety-eight million, eight hundred seventy-nine thousand, seven hundred forty-seven".