677101021 has 4 divisors (see below), whose sum is σ = 685672000. Its totient is φ = 668530044.

The previous prime is 677101003. The next prime is 677101027. The reversal of 677101021 is 120101776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 677101021 - 2¹¹ = 677098973 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 (677101027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4285371 + ... + 4285528.

It is an arithmetic number, because the mean of its divisors is an integer number (171418000).

Almost surely, 2^677101021 is an apocalyptic number.

It is an amenable number.

677101021 is a deficient number, since it is larger than the sum of its proper divisors (8570979).

677101021 is an equidigital number, since it uses as much as digits as its factorization.

677101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570978.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 677101021 is about 26021.1648663160. The cubic root of 677101021 is about 878.1145154813.

Adding to 677101021 its reverse (120101776), we get a palindrome (797202797).

The spelling of 677101021 in words is "six hundred seventy-seven million, one hundred one thousand, twenty-one".