721714667 has 2 divisors, whose sum is σ = 721714668. Its totient is φ = 721714666.

The previous prime is 721714661. The next prime is 721714673. The reversal of 721714667 is 766417127.

It is a balanced prime because it is at equal distance from previous prime (721714661) and next prime (721714673).

It is a cyclic number.

It is not a de Polignac number, because 721714667 - 2⁶ = 721714603 is a prime.

It is not a weakly prime, because it can be changed into another prime (721714661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360857333 + 360857334.

It is an arithmetic number, because the mean of its divisors is an integer number (360857334).

Almost surely, 2^721714667 is an apocalyptic number.

721714667 is a deficient number, since it is larger than the sum of its proper divisors (1).

721714667 is an equidigital number, since it uses as much as digits as its factorization.

721714667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 41.

The square root of 721714667 is about 26864.7476630621. The cubic root of 721714667 is about 896.9918775548.

The spelling of 721714667 in words is "seven hundred twenty-one million, seven hundred fourteen thousand, six hundred sixty-seven".