635575673 has 2 divisors, whose sum is σ = 635575674. Its totient is φ = 635575672.

The previous prime is 635575667. The next prime is 635575697. The reversal of 635575673 is 376575536.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572022889 + 63552784 = 23917^2 + 7972^2 .

It is a cyclic number.

It is not a de Polignac number, because 635575673 - 2¹² = 635571577 is a prime.

It is a super-2 number, since 2×635575673² = 807912872218805858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (635575273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317787836 + 317787837.

It is an arithmetic number, because the mean of its divisors is an integer number (317787837).

Almost surely, 2^635575673 is an apocalyptic number.

It is an amenable number.

635575673 is a deficient number, since it is larger than the sum of its proper divisors (1).

635575673 is an equidigital number, since it uses as much as digits as its factorization.

635575673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1984500, while the sum is 47.

The square root of 635575673 is about 25210.6261921437. The cubic root of 635575673 is about 859.7834649543.

It can be divided in two parts, 6355 and 75673, that added together give a palindrome (82028).

The spelling of 635575673 in words is "six hundred thirty-five million, five hundred seventy-five thousand, six hundred seventy-three".