635206849 has 4 divisors (see below), whose sum is σ = 638217520. Its totient is φ = 632196180.

The previous prime is 635206843. The next prime is 635206931. The reversal of 635206849 is 948602536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 635206849 - 2⁷ = 635206721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (635206843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505019 + ... + 1505440.

It is an arithmetic number, because the mean of its divisors is an integer number (159554380).

Almost surely, 2^635206849 is an apocalyptic number.

It is an amenable number.

635206849 is a deficient number, since it is larger than the sum of its proper divisors (3010671).

635206849 is a wasteful number, since it uses less digits than its factorization.

635206849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010670.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 635206849 is about 25203.3102786122. The cubic root of 635206849 is about 859.6171222463.

The spelling of 635206849 in words is "six hundred thirty-five million, two hundred six thousand, eight hundred forty-nine".