635240091 has 32 divisors (see below), whose sum is σ = 904654080. Its totient is φ = 395366400.

The previous prime is 635240077. The next prime is 635240113. The reversal of 635240091 is 190042536.

It is not a de Polignac number, because 635240091 - 2⁷ = 635239963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (635240051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1799371 + ... + 1799723.

It is an arithmetic number, because the mean of its divisors is an integer number (28270440).

Almost surely, 2^635240091 is an apocalyptic number.

635240091 is a deficient number, since it is larger than the sum of its proper divisors (269413989).

635240091 is a wasteful number, since it uses less digits than its factorization.

635240091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 635240091 is about 25203.9697468474. The cubic root of 635240091 is about 859.6321173060.

The spelling of 635240091 in words is "six hundred thirty-five million, two hundred forty thousand, ninety-one".