621614005 has 4 divisors (see below), whose sum is σ = 745936812. Its totient is φ = 497291200.

The previous prime is 621613987. The next prime is 621614041. The reversal of 621614005 is 500416126.

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 203861284 + 417752721 = 14278^2 + 20439^2 .

It is not a de Polignac number, because 621614005 - 2²¹ = 619516853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62161396 + ... + 62161405.

It is an arithmetic number, because the mean of its divisors is an integer number (186484203).

Almost surely, 2^621614005 is an apocalyptic number.

It is an amenable number.

621614005 is a deficient number, since it is larger than the sum of its proper divisors (124322807).

621614005 is a wasteful number, since it uses less digits than its factorization.

621614005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124322806.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 621614005 is about 24932.1881310085. The cubic root of 621614005 is about 853.4411846749.

It can be divided in two parts, 62161 and 4005, that added together give a palindrome (66166).

The spelling of 621614005 in words is "six hundred twenty-one million, six hundred fourteen thousand, five".