636696001 has 4 divisors (see below), whose sum is σ = 636812500. Its totient is φ = 636579504.

The previous prime is 636695989. The next prime is 636696013. The reversal of 636696001 is 100696636.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (636695989) and next prime (636696013).

It can be written as a sum of positive squares in 2 ways, for example, as 277555600 + 359140401 = 16660^2 + 18951^2 .

It is a cyclic number.

It is not a de Polignac number, because 636696001 - 2¹³ = 636687809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636696031) 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, 49626 + ... + 61123.

It is an arithmetic number, because the mean of its divisors is an integer number (159203125).

Almost surely, 2^636696001 is an apocalyptic number.

It is an amenable number.

636696001 is a deficient number, since it is larger than the sum of its proper divisors (116499).

636696001 is a wasteful number, since it uses less digits than its factorization.

636696001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116498.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 636696001 is about 25232.8357700834. The cubic root of 636696001 is about 860.2883479643.

The spelling of 636696001 in words is "six hundred thirty-six million, six hundred ninety-six thousand, one".