148887791 has 4 divisors (see below), whose sum is σ = 160340712. Its totient is φ = 137434872.

The previous prime is 148887737. The next prime is 148887793. The reversal of 148887791 is 197788841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197788841 = 19 ⋅10409939.

It is a cyclic number.

It is not a de Polignac number, because 148887791 - 2¹⁴ = 148871407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148887793) 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 in 3 ways as a sum of consecutive naturals, for example, 5726441 + ... + 5726466.

It is an arithmetic number, because the mean of its divisors is an integer number (40085178).

Almost surely, 2^148887791 is an apocalyptic number.

148887791 is a deficient number, since it is larger than the sum of its proper divisors (11452921).

148887791 is a wasteful number, since it uses less digits than its factorization.

148887791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11452920.

The product of its digits is 903168, while the sum is 53.

The square root of 148887791 is about 12201.9584903408. The cubic root of 148887791 is about 530.0128049594.

The spelling of 148887791 in words is "one hundred forty-eight million, eight hundred eighty-seven thousand, seven hundred ninety-one".