621102047 has 4 divisors (see below), whose sum is σ = 625843416. Its totient is φ = 616360680.

The previous prime is 621102037. The next prime is 621102059. The reversal of 621102047 is 740201126.

621102047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621102047 - 2⁶ = 621101983 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 (621102007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2370488 + ... + 2370749.

It is an arithmetic number, because the mean of its divisors is an integer number (156460854).

Almost surely, 2^621102047 is an apocalyptic number.

621102047 is a deficient number, since it is larger than the sum of its proper divisors (4741369).

621102047 is a wasteful number, since it uses less digits than its factorization.

621102047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741368.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 621102047 is about 24921.9190071712. The cubic root of 621102047 is about 853.2068237781.

The spelling of 621102047 in words is "six hundred twenty-one million, one hundred two thousand, forty-seven".