721270023 has 8 divisors (see below), whose sum is σ = 965243136. Its totient is φ = 479071800.

The previous prime is 721270021. The next prime is 721270031. The reversal of 721270023 is 320072127.

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

It is not a de Polignac number, because 721270023 - 2¹ = 721270021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 721269975 and 721270002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721270021) 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, 442773 + ... + 444398.

It is an arithmetic number, because the mean of its divisors is an integer number (120655392).

Almost surely, 2^721270023 is an apocalyptic number.

721270023 is a deficient number, since it is larger than the sum of its proper divisors (243973113).

721270023 is a wasteful number, since it uses less digits than its factorization.

721270023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887445.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 721270023 is about 26856.4707845242. The cubic root of 721270023 is about 896.8076293051.

The spelling of 721270023 in words is "seven hundred twenty-one million, two hundred seventy thousand, twenty-three".