421007347 has 4 divisors (see below), whose sum is σ = 421624440. Its totient is φ = 420390256.

The previous prime is 421007287. The next prime is 421007369. The reversal of 421007347 is 743700124.

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 421007347 - 2⁷ = 421007219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421007747) 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, 307522 + ... + 308887.

It is an arithmetic number, because the mean of its divisors is an integer number (105406110).

Almost surely, 2^421007347 is an apocalyptic number.

421007347 is a deficient number, since it is larger than the sum of its proper divisors (617093).

421007347 is an equidigital number, since it uses as much as digits as its factorization.

421007347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617092.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 421007347 is about 20518.4635633373. The cubic root of 421007347 is about 749.4854823688.

The spelling of 421007347 in words is "four hundred twenty-one million, seven thousand, three hundred forty-seven".