721421483 has 4 divisors (see below), whose sum is σ = 722038728. Its totient is φ = 720804240.

The previous prime is 721421461. The next prime is 721421521. The reversal of 721421483 is 384124127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 384124127 = 23 ⋅16701049.

It is a cyclic number.

It is not a de Polignac number, because 721421483 - 2¹⁸ = 721159339 is a prime.

It is a super-2 number, since 2×721421483² = 1040897912267838578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721421423) 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, 306866 + ... + 309207.

It is an arithmetic number, because the mean of its divisors is an integer number (180509682).

Almost surely, 2^721421483 is an apocalyptic number.

721421483 is a deficient number, since it is larger than the sum of its proper divisors (617245).

721421483 is a wasteful number, since it uses less digits than its factorization.

721421483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617244.

The product of its digits is 10752, while the sum is 32.

The square root of 721421483 is about 26859.2904411118. The cubic root of 721421483 is about 896.8703986668.

The spelling of 721421483 in words is "seven hundred twenty-one million, four hundred twenty-one thousand, four hundred eighty-three".