721790067 has 8 divisors (see below), whose sum is σ = 964812496. Its totient is φ = 479980512.

The previous prime is 721790059. The next prime is 721790119. The reversal of 721790067 is 760097127.

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

It is not a de Polignac number, because 721790067 - 2³ = 721790059 is a prime.

It is a super-3 number, since 3×721790067³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721790767) 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, 301828 + ... + 304209.

It is an arithmetic number, because the mean of its divisors is an integer number (120601562).

Almost surely, 2^721790067 is an apocalyptic number.

721790067 is a deficient number, since it is larger than the sum of its proper divisors (243022429).

721790067 is a wasteful number, since it uses less digits than its factorization.

721790067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606437.

The product of its (nonzero) digits is 37044, while the sum is 39.

The square root of 721790067 is about 26866.1509524532. The cubic root of 721790067 is about 897.0231137370.

The spelling of 721790067 in words is "seven hundred twenty-one million, seven hundred ninety thousand, sixty-seven".