677739997 has 12 divisors (see below), whose sum is σ = 752343228. Its totient is φ = 610016000.

The previous prime is 677739971. The next prime is 677740009. The reversal of 677739997 is 799937776.

It can be written as a sum of positive squares in 2 ways, for example, as 281769796 + 395970201 = 16786^2 + 19899^2 .

It is not a de Polignac number, because 677739997 - 2¹⁹ = 677215709 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 (677739917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15508 + ... + 39949.

It is an arithmetic number, because the mean of its divisors is an integer number (62695269).

Almost surely, 2^677739997 is an apocalyptic number.

It is an amenable number.

677739997 is a deficient number, since it is larger than the sum of its proper divisors (74603231).

677739997 is a wasteful number, since it uses less digits than its factorization.

677739997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55580 (or 55569 counting only the distinct ones).

The product of its digits is 31505922, while the sum is 64.

The square root of 677739997 is about 26033.4399763074. The cubic root of 677739997 is about 878.3906523626.

The spelling of 677739997 in words is "six hundred seventy-seven million, seven hundred thirty-nine thousand, nine hundred ninety-seven".