687422369349 has 6 divisors (see below), whose sum is σ = 992943422406. Its totient is φ = 458281579560.

The previous prime is 687422369329. The next prime is 687422369363. The reversal of 687422369349 is 943963224786.

687422369349 is a `hidden beast` number, since 6 + 8 + 7 + 4 + 223 + 69 + 349 = 666.

It can be written as a sum of positive squares in only one way, i.e., 686354256225 + 1068113124 = 828465^2 + 32682^2 .

It is not a de Polignac number, because 687422369349 - 2²¹ = 687420272197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687422369329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38190131622 + ... + 38190131639.

It is an arithmetic number, because the mean of its divisors is an integer number (165490570401).

Almost surely, 2^687422369349 is an apocalyptic number.

It is an amenable number.

687422369349 is a deficient number, since it is larger than the sum of its proper divisors (305521053057).

687422369349 is a wasteful number, since it uses less digits than its factorization.

687422369349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76380263267 (or 76380263264 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 63.

The spelling of 687422369349 in words is "six hundred eighty-seven billion, four hundred twenty-two million, three hundred sixty-nine thousand, three hundred forty-nine".