147781091 has 2 divisors, whose sum is σ = 147781092. Its totient is φ = 147781090.

The previous prime is 147781063. The next prime is 147781111. The reversal of 147781091 is 190187741.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 147781091 - 2⁶ = 147781027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (147781691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73890545 + 73890546.

It is an arithmetic number, because the mean of its divisors is an integer number (73890546).

Almost surely, 2^147781091 is an apocalyptic number.

147781091 is a deficient number, since it is larger than the sum of its proper divisors (1).

147781091 is an equidigital number, since it uses as much as digits as its factorization.

147781091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 147781091 is about 12156.5246267180. The cubic root of 147781091 is about 528.6963224054.

The spelling of 147781091 in words is "one hundred forty-seven million, seven hundred eighty-one thousand, ninety-one".