423657593 has 2 divisors, whose sum is σ = 423657594. Its totient is φ = 423657592.

The previous prime is 423657571. The next prime is 423657601. The reversal of 423657593 is 395756324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386043904 + 37613689 = 19648^2 + 6133^2 .

It is a cyclic number.

It is not a de Polignac number, because 423657593 - 2²⁶ = 356548729 is a prime.

It is a super-2 number, since 2×423657593² = 358971512213107298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423657523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211828796 + 211828797.

It is an arithmetic number, because the mean of its divisors is an integer number (211828797).

Almost surely, 2^423657593 is an apocalyptic number.

It is an amenable number.

423657593 is a deficient number, since it is larger than the sum of its proper divisors (1).

423657593 is an equidigital number, since it uses as much as digits as its factorization.

423657593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 44.

The square root of 423657593 is about 20582.9442257419. The cubic root of 423657593 is about 751.0548670525.

The spelling of 423657593 in words is "four hundred twenty-three million, six hundred fifty-seven thousand, five hundred ninety-three".