698551945 has 16 divisors (see below), whose sum is σ = 1031708160. Its totient is φ = 442160064.

The previous prime is 698551907. The next prime is 698551951. The reversal of 698551945 is 549155896.

It is a cyclic number.

It is not a de Polignac number, because 698551945 - 2¹⁹ = 698027657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 698551892 and 698551901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767185 + ... + 768094.

It is an arithmetic number, because the mean of its divisors is an integer number (64481760).

Almost surely, 2^698551945 is an apocalyptic number.

698551945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

698551945 is a deficient number, since it is larger than the sum of its proper divisors (333156215).

698551945 is a wasteful number, since it uses less digits than its factorization.

698551945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535304.

The product of its digits is 1944000, while the sum is 52.

The square root of 698551945 is about 26430.1332762436. The cubic root of 698551945 is about 887.2913248725.

The spelling of 698551945 in words is "six hundred ninety-eight million, five hundred fifty-one thousand, nine hundred forty-five".