698137663 has 2 divisors, whose sum is σ = 698137664. Its totient is φ = 698137662.

The previous prime is 698137613. The next prime is 698137681. The reversal of 698137663 is 366731896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 698137663 - 2⁹ = 698137151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698137603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349068831 + 349068832.

It is an arithmetic number, because the mean of its divisors is an integer number (349068832).

Almost surely, 2^698137663 is an apocalyptic number.

698137663 is a deficient number, since it is larger than the sum of its proper divisors (1).

698137663 is an equidigital number, since it uses as much as digits as its factorization.

698137663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The square root of 698137663 is about 26422.2948094975. The cubic root of 698137663 is about 887.1158850366.

It can be divided in two parts, 6981 and 37663, that added together give a palindrome (44644).

The spelling of 698137663 in words is "six hundred ninety-eight million, one hundred thirty-seven thousand, six hundred sixty-three".