621049429 has 16 divisors (see below), whose sum is σ = 833857920. Its totient is φ = 446708160.

The previous prime is 621049417. The next prime is 621049439. The reversal of 621049429 is 924940126.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 621049429 - 2¹³ = 621041237 is a prime.

It is a super-2 number, since 2×621049429² = 771404786522452082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621049439) 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 15 ways as a sum of consecutive naturals, for example, 309214 + ... + 311215.

It is an arithmetic number, because the mean of its divisors is an integer number (52116120).

Almost surely, 2^621049429 is an apocalyptic number.

It is an amenable number.

621049429 is a deficient number, since it is larger than the sum of its proper divisors (212808491).

621049429 is a wasteful number, since it uses less digits than its factorization.

621049429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620460.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 621049429 is about 24920.8633277421. The cubic root of 621049429 is about 853.1827293454.

The spelling of 621049429 in words is "six hundred twenty-one million, forty-nine thousand, four hundred twenty-nine".