148273991 has 2 divisors, whose sum is σ = 148273992. Its totient is φ = 148273990.

The previous prime is 148273973. The next prime is 148274011. The reversal of 148273991 is 199372841.

It is a weak prime.

It is an emirp because it is prime and its reverse (199372841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148273991 - 2¹⁴ = 148257607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148273291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74136995 + 74136996.

It is an arithmetic number, because the mean of its divisors is an integer number (74136996).

Almost surely, 2^148273991 is an apocalyptic number.

148273991 is a deficient number, since it is larger than the sum of its proper divisors (1).

148273991 is an equidigital number, since it uses as much as digits as its factorization.

148273991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 148273991 is about 12176.7808143203. The cubic root of 148273991 is about 529.2834638943.

The spelling of 148273991 in words is "one hundred forty-eight million, two hundred seventy-three thousand, nine hundred ninety-one".