721924043 has 4 divisors (see below), whose sum is σ = 722033400. Its totient is φ = 721814688.

The previous prime is 721924031. The next prime is 721924067. The reversal of 721924043 is 340429127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340429127 = 109 ⋅3123203.

It is a cyclic number.

It is not a de Polignac number, because 721924043 - 2¹⁰ = 721923019 is a prime.

It is a super-2 number, since 2×721924043² = 1042348647722931698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721924003) 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, 44093 + ... + 58206.

It is an arithmetic number, because the mean of its divisors is an integer number (180508350).

Almost surely, 2^721924043 is an apocalyptic number.

721924043 is a deficient number, since it is larger than the sum of its proper divisors (109357).

721924043 is a wasteful number, since it uses less digits than its factorization.

721924043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109356.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 721924043 is about 26868.6442344976. The cubic root of 721924043 is about 897.0786110065.

The spelling of 721924043 in words is "seven hundred twenty-one million, nine hundred twenty-four thousand, forty-three".