621061477 has 8 divisors (see below), whose sum is σ = 646329600. Its totient is φ = 596050224.

The previous prime is 621061457. The next prime is 621061487. The reversal of 621061477 is 774160126.

It is a happy number.

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

It is not a de Polignac number, because 621061477 - 2⁷ = 621061349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621061457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59277 + ... + 68962.

It is an arithmetic number, because the mean of its divisors is an integer number (80791200).

Almost surely, 2^621061477 is an apocalyptic number.

It is an amenable number.

621061477 is a deficient number, since it is larger than the sum of its proper divisors (25268123).

621061477 is a wasteful number, since it uses less digits than its factorization.

621061477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128435.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 621061477 is about 24921.1050517428. The cubic root of 621061477 is about 853.1882463937.

The spelling of 621061477 in words is "six hundred twenty-one million, sixty-one thousand, four hundred seventy-seven".