148693591 has 2 divisors, whose sum is σ = 148693592. Its totient is φ = 148693590.

The previous prime is 148693561. The next prime is 148693609. The reversal of 148693591 is 195396841.

It is a strong prime.

It is an emirp because it is prime and its reverse (195396841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148693591 - 2⁹ = 148693079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148693541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74346795 + 74346796.

It is an arithmetic number, because the mean of its divisors is an integer number (74346796).

Almost surely, 2^148693591 is an apocalyptic number.

148693591 is a deficient number, since it is larger than the sum of its proper divisors (1).

148693591 is an equidigital number, since it uses as much as digits as its factorization.

148693591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 148693591 is about 12193.9981548301. The cubic root of 148693591 is about 529.7822660870.

The spelling of 148693591 in words is "one hundred forty-eight million, six hundred ninety-three thousand, five hundred ninety-one".