698423039 has 4 divisors (see below), whose sum is σ = 698568456. Its totient is φ = 698277624.

The previous prime is 698423003. The next prime is 698423051. The reversal of 698423039 is 930324896.

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 698423039 - 2¹⁶ = 698357503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698423939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65249 + ... + 75194.

It is an arithmetic number, because the mean of its divisors is an integer number (174642114).

Almost surely, 2^698423039 is an apocalyptic number.

698423039 is a deficient number, since it is larger than the sum of its proper divisors (145417).

698423039 is a wasteful number, since it uses less digits than its factorization.

698423039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145416.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 698423039 is about 26427.6945456845. The cubic root of 698423039 is about 887.2367432900.

The spelling of 698423039 in words is "six hundred ninety-eight million, four hundred twenty-three thousand, thirty-nine".