9915432001 has 2 divisors, whose sum is σ = 9915432002. Its totient is φ = 9915432000.

The previous prime is 9915431993. The next prime is 9915432011. The reversal of 9915432001 is 1002345199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7340376976 + 2575055025 = 85676^2 + 50745^2 .

It is an emirp because it is prime and its reverse (1002345199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9915432001 - 2³ = 9915431993 is a prime.

It is not a weakly prime, because it can be changed into another prime (9915432011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4957716000 + 4957716001.

It is an arithmetic number, because the mean of its divisors is an integer number (4957716001).

Almost surely, 2^9915432001 is an apocalyptic number.

It is an amenable number.

9915432001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9915432001 is an equidigital number, since it uses as much as digits as its factorization.

9915432001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 9915432001 is about 99576.2622365391. The cubic root of 9915432001 is about 2148.3442814844.

The spelling of 9915432001 in words is "nine billion, nine hundred fifteen million, four hundred thirty-two thousand, one".