677310894121 has 3 divisors (see below), whose sum is σ = 677311717111. Its totient is φ = 677310071132.

The previous prime is 677310894101. The next prime is 677310894133. The reversal of 677310894121 is 121498013776.

The square root of 677310894121 is 822989.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 386897684121 + 290413210000 = 622011^2 + 538900^2 .

It is not a de Polignac number, because 677310894121 - 2¹³ = 677310885929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677310894101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 411495 + ... + 1234483.

Almost surely, 2^677310894121 is an apocalyptic number.

677310894121 is the 822989-th square number.

677310894121 is the 411495-th centered octagonal number.

It is an amenable number.

677310894121 is a deficient number, since it is larger than the sum of its proper divisors (822990).

677310894121 is an frugal number, since it uses more digits than its factorization.

677310894121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645978 (or 822989 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

Multiplying 677310894121 by its sum of digits (49), we get a square (33188233811929 = 5760923²).

The spelling of 677310894121 in words is "six hundred seventy-seven billion, three hundred ten million, eight hundred ninety-four thousand, one hundred twenty-one".