621084677 has 4 divisors (see below), whose sum is σ = 642501420. Its totient is φ = 599667936.

The previous prime is 621084661. The next prime is 621084679. The reversal of 621084677 is 776480126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 432681601 + 188403076 = 20801^2 + 13726^2 .

It is a cyclic number.

It is not a de Polignac number, because 621084677 - 2⁴ = 621084661 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 (621084679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10708328 + ... + 10708385.

It is an arithmetic number, because the mean of its divisors is an integer number (160625355).

Almost surely, 2^621084677 is an apocalyptic number.

It is an amenable number.

621084677 is a deficient number, since it is larger than the sum of its proper divisors (21416743).

621084677 is a wasteful number, since it uses less digits than its factorization.

621084677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21416742.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 621084677 is about 24921.5705163218. The cubic root of 621084677 is about 853.1988699909.

The spelling of 621084677 in words is "six hundred twenty-one million, eighty-four thousand, six hundred seventy-seven".