721010047 has 2 divisors, whose sum is σ = 721010048. Its totient is φ = 721010046.

The previous prime is 721009973. The next prime is 721010071. The reversal of 721010047 is 740010127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721010047 - 2²³ = 712621439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721010077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360505023 + 360505024.

It is an arithmetic number, because the mean of its divisors is an integer number (360505024).

Almost surely, 2^721010047 is an apocalyptic number.

721010047 is a deficient number, since it is larger than the sum of its proper divisors (1).

721010047 is an equidigital number, since it uses as much as digits as its factorization.

721010047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 721010047 is about 26851.6302484598. The cubic root of 721010047 is about 896.6998673156.

The spelling of 721010047 in words is "seven hundred twenty-one million, ten thousand, forty-seven".