63961001 has 8 divisors (see below), whose sum is σ = 70011144. Its totient is φ = 58072320.

The previous prime is 63960997. The next prime is 63961013. The reversal of 63961001 is 10016936.

It can be written as a sum of positive squares in 4 ways, for example, as 5040025 + 58920976 = 2245^2 + 7676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63961001 - 2² = 63960997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63961061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39536 + ... + 41121.

It is an arithmetic number, because the mean of its divisors is an integer number (8751393).

Almost surely, 2^63961001 is an apocalyptic number.

63961001 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

63961001 is a deficient number, since it is larger than the sum of its proper divisors (6050143).

63961001 is a wasteful number, since it uses less digits than its factorization.

63961001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80731.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 63961001 is about 7997.5621910680. The cubic root of 63961001 is about 399.9187355747.

Adding to 63961001 its reverse (10016936), we get a palindrome (73977937).

The spelling of 63961001 in words is "sixty-three million, nine hundred sixty-one thousand, one".