698477887 has 2 divisors, whose sum is σ = 698477888. Its totient is φ = 698477886.

The previous prime is 698477873. The next prime is 698477903. The reversal of 698477887 is 788774896.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698477887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698477807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349238943 + 349238944.

It is an arithmetic number, because the mean of its divisors is an integer number (349238944).

Almost surely, 2^698477887 is an apocalyptic number.

698477887 is a deficient number, since it is larger than the sum of its proper divisors (1).

698477887 is an equidigital number, since it uses as much as digits as its factorization.

698477887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37933056, while the sum is 64.

The square root of 698477887 is about 26428.7322246074. The cubic root of 698477887 is about 887.2599679377.

The spelling of 698477887 in words is "six hundred ninety-eight million, four hundred seventy-seven thousand, eight hundred eighty-seven".