148591691 has 2 divisors, whose sum is σ = 148591692. Its totient is φ = 148591690.

The previous prime is 148591687. The next prime is 148591693. The reversal of 148591691 is 196195841.

148591691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 148591691 - 2² = 148591687 is a prime.

Together with 148591693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (148591693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74295845 + 74295846.

It is an arithmetic number, because the mean of its divisors is an integer number (74295846).

Almost surely, 2^148591691 is an apocalyptic number.

148591691 is a deficient number, since it is larger than the sum of its proper divisors (1).

148591691 is an equidigital number, since it uses as much as digits as its factorization.

148591691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 44.

The square root of 148591691 is about 12189.8191537036. The cubic root of 148591691 is about 529.6612181673.

The spelling of 148591691 in words is "one hundred forty-eight million, five hundred ninety-one thousand, six hundred ninety-one".