698745406123 has 4 divisors (see below), whose sum is σ = 698747921608. Its totient is φ = 698742890640.

The previous prime is 698745406109. The next prime is 698745406129. The reversal of 698745406123 is 321604547896.

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 698745406123 - 2³³ = 690155471531 is a prime.

It is a super-2 number, since 2×698745406123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698745406129) 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, 780786 + ... + 1416727.

It is an arithmetic number, because the mean of its divisors is an integer number (174686980402).

It is a 1-persistent number, because it is pandigital, but 2⋅698745406123 = 1397490812246 is not.

Almost surely, 2^698745406123 is an apocalyptic number.

698745406123 is a deficient number, since it is larger than the sum of its proper divisors (2515485).

698745406123 is a wasteful number, since it uses less digits than its factorization.

698745406123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515484.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 698745406123 in words is "six hundred ninety-eight billion, seven hundred forty-five million, four hundred six thousand, one hundred twenty-three".