201432991 has 2 divisors, whose sum is σ = 201432992. Its totient is φ = 201432990.

The previous prime is 201432977. The next prime is 201433007. The reversal of 201432991 is 199234102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201432991 - 2²¹ = 199335839 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201432911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100716495 + 100716496.

It is an arithmetic number, because the mean of its divisors is an integer number (100716496).

Almost surely, 2^201432991 is an apocalyptic number.

201432991 is a deficient number, since it is larger than the sum of its proper divisors (1).

201432991 is an equidigital number, since it uses as much as digits as its factorization.

201432991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 201432991 is about 14192.7090789602. The cubic root of 201432991 is about 586.1969221347.

The spelling of 201432991 in words is "two hundred one million, four hundred thirty-two thousand, nine hundred ninety-one".