621671167 has 8 divisors (see below), whose sum is σ = 685062224. Its totient is φ = 560504448.

The previous prime is 621671159. The next prime is 621671189. The reversal of 621671167 is 761176126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 621671167 - 2³ = 621671159 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 (621671137) 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 7 ways as a sum of consecutive naturals, for example, 555498 + ... + 556615.

It is an arithmetic number, because the mean of its divisors is an integer number (85632778).

Almost surely, 2^621671167 is an apocalyptic number.

621671167 is a deficient number, since it is larger than the sum of its proper divisors (63391057).

621671167 is a wasteful number, since it uses less digits than its factorization.

621671167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112169.

The product of its digits is 21168, while the sum is 37.

The square root of 621671167 is about 24933.3344540998. The cubic root of 621671167 is about 853.4673439470.

The spelling of 621671167 in words is "six hundred twenty-one million, six hundred seventy-one thousand, one hundred sixty-seven".