721924067 has 2 divisors, whose sum is σ = 721924068. Its totient is φ = 721924066.

The previous prime is 721924031. The next prime is 721924079. The reversal of 721924067 is 760429127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721924067 - 2⁶ = 721924003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 721924067.

It is not a weakly prime, because it can be changed into another prime (721924097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360962033 + 360962034.

It is an arithmetic number, because the mean of its divisors is an integer number (360962034).

Almost surely, 2^721924067 is an apocalyptic number.

721924067 is a deficient number, since it is larger than the sum of its proper divisors (1).

721924067 is an equidigital number, since it uses as much as digits as its factorization.

721924067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 721924067 is about 26868.6446811148. The cubic root of 721924067 is about 897.0786209475.

The spelling of 721924067 in words is "seven hundred twenty-one million, nine hundred twenty-four thousand, sixty-seven".