621161239 has 8 divisors (see below), whose sum is σ = 625121280. Its totient is φ = 617213016.

The previous prime is 621161227. The next prime is 621161251. The reversal of 621161239 is 932161126.

It is an interprime number because it is at equal distance from previous prime (621161227) and next prime (621161251).

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 621161239 - 2²¹ = 619064087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621161239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621161209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117634 + ... + 122800.

It is an arithmetic number, because the mean of its divisors is an integer number (78140160).

Almost surely, 2^621161239 is an apocalyptic number.

621161239 is a deficient number, since it is larger than the sum of its proper divisors (3960041).

621161239 is a wasteful number, since it uses less digits than its factorization.

621161239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5909.

The product of its digits is 3888, while the sum is 31.

The square root of 621161239 is about 24923.1065278789. The cubic root of 621161239 is about 853.2339269004.

The spelling of 621161239 in words is "six hundred twenty-one million, one hundred sixty-one thousand, two hundred thirty-nine".