621992049 has 8 divisors (see below), whose sum is σ = 947797440. Its totient is φ = 355424016.

The previous prime is 621992027. The next prime is 621992053. The reversal of 621992049 is 940299126.

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

It is not a de Polignac number, because 621992049 - 2¹² = 621987953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621992049.

It is not an unprimeable number, because it can be changed into a prime (621992009) 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, 14809314 + ... + 14809355.

It is an arithmetic number, because the mean of its divisors is an integer number (118474680).

Almost surely, 2^621992049 is an apocalyptic number.

It is an amenable number.

621992049 is a deficient number, since it is larger than the sum of its proper divisors (325805391).

621992049 is a wasteful number, since it uses less digits than its factorization.

621992049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29618679.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 621992049 is about 24939.7684231430. The cubic root of 621992049 is about 853.6141606873.

The spelling of 621992049 in words is "six hundred twenty-one million, nine hundred ninety-two thousand, forty-nine".