158989801 has 2 divisors, whose sum is σ = 158989802. Its totient is φ = 158989800.

The previous prime is 158989799. The next prime is 158989807. The reversal of 158989801 is 108989851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133749225 + 25240576 = 11565^2 + 5024^2 .

It is a cyclic number.

It is not a de Polignac number, because 158989801 - 2¹ = 158989799 is a prime.

Together with 158989799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (158989807) 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 as a sum of consecutive naturals, namely, 79494900 + 79494901.

It is an arithmetic number, because the mean of its divisors is an integer number (79494901).

Almost surely, 2^158989801 is an apocalyptic number.

It is an amenable number.

158989801 is a deficient number, since it is larger than the sum of its proper divisors (1).

158989801 is an equidigital number, since it uses as much as digits as its factorization.

158989801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 49.

The square root of 158989801 is about 12609.1157897769. The cubic root of 158989801 is about 541.7385677913.

The spelling of 158989801 in words is "one hundred fifty-eight million, nine hundred eighty-nine thousand, eight hundred one".