621427447 has 8 divisors (see below), whose sum is σ = 642891312. Its totient is φ = 600264000.

The previous prime is 621427441. The next prime is 621427483. The reversal of 621427447 is 744724126.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621427447 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 (621427441) 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, 70893 + ... + 79174.

It is an arithmetic number, because the mean of its divisors is an integer number (80361414).

Almost surely, 2^621427447 is an apocalyptic number.

621427447 is a deficient number, since it is larger than the sum of its proper divisors (21463865).

621427447 is a wasteful number, since it uses less digits than its factorization.

621427447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150209.

The product of its digits is 75264, while the sum is 37.

The square root of 621427447 is about 24928.4465420531. The cubic root of 621427447 is about 853.3557982401.

The spelling of 621427447 in words is "six hundred twenty-one million, four hundred twenty-seven thousand, four hundred forty-seven".