621414681 has 8 divisors (see below), whose sum is σ = 829128960. Its totient is φ = 413988432.

The previous prime is 621414671. The next prime is 621414709. The reversal of 621414681 is 186414126.

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

It is not a de Polignac number, because 621414681 - 2¹⁰ = 621413657 is a prime.

It is a super-4 number, since 4×621414681⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (621414611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66921 + ... + 75638.

It is an arithmetic number, because the mean of its divisors is an integer number (103641120).

Almost surely, 2^621414681 is an apocalyptic number.

It is an amenable number.

621414681 is a deficient number, since it is larger than the sum of its proper divisors (207714279).

621414681 is a wasteful number, since it uses less digits than its factorization.

621414681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144015.

The product of its digits is 9216, while the sum is 33.

The square root of 621414681 is about 24928.1904878794. The cubic root of 621414681 is about 853.3499546967.

The spelling of 621414681 in words is "six hundred twenty-one million, four hundred fourteen thousand, six hundred eighty-one".