723497653 has 2 divisors, whose sum is σ = 723497654. Its totient is φ = 723497652.

The previous prime is 723497633. The next prime is 723497657. The reversal of 723497653 is 356794327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 717061284 + 6436369 = 26778^2 + 2537^2 .

It is an emirp because it is prime and its reverse (356794327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723497653 - 2²¹ = 721400501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723497657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361748826 + 361748827.

It is an arithmetic number, because the mean of its divisors is an integer number (361748827).

Almost surely, 2^723497653 is an apocalyptic number.

It is an amenable number.

723497653 is a deficient number, since it is larger than the sum of its proper divisors (1).

723497653 is an equidigital number, since it uses as much as digits as its factorization.

723497653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 46.

The square root of 723497653 is about 26897.9116847386. The cubic root of 723497653 is about 897.7299387313.

The spelling of 723497653 in words is "seven hundred twenty-three million, four hundred ninety-seven thousand, six hundred fifty-three".