621149019 has 8 divisors (see below), whose sum is σ = 836239872. Its totient is φ = 410078760.

The previous prime is 621148993. The next prime is 621149021. The reversal of 621149019 is 910941126.

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

It is not a de Polignac number, because 621149019 - 2²⁹ = 84278107 is a prime.

It is a super-2 number, since 2×621149019² = 771652207609324722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621149069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004787 + ... + 1005404.

It is an arithmetic number, because the mean of its divisors is an integer number (104529984).

Almost surely, 2^621149019 is an apocalyptic number.

621149019 is a deficient number, since it is larger than the sum of its proper divisors (215090853).

621149019 is a wasteful number, since it uses less digits than its factorization.

621149019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010297.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 621149019 is about 24922.8613726434. The cubic root of 621149019 is about 853.2283316881.

The spelling of 621149019 in words is "six hundred twenty-one million, one hundred forty-nine thousand, nineteen".