721502748467 has 2 divisors, whose sum is σ = 721502748468. Its totient is φ = 721502748466.

The previous prime is 721502748391. The next prime is 721502748481. The reversal of 721502748467 is 764847205127.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (764847205127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 721502748467 - 2¹⁰ = 721502747443 is a prime.

It is not a weakly prime, because it can be changed into another prime (721502741467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360751374233 + 360751374234.

It is an arithmetic number, because the mean of its divisors is an integer number (360751374234).

Almost surely, 2^721502748467 is an apocalyptic number.

721502748467 is a deficient number, since it is larger than the sum of its proper divisors (1).

721502748467 is an equidigital number, since it uses as much as digits as its factorization.

721502748467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5268480, while the sum is 53.

The spelling of 721502748467 in words is "seven hundred twenty-one billion, five hundred two million, seven hundred forty-eight thousand, four hundred sixty-seven".