148691887 has 2 divisors, whose sum is σ = 148691888. Its totient is φ = 148691886.

The previous prime is 148691869. The next prime is 148691909. The reversal of 148691887 is 788196841.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 148691887 - 2⁷ = 148691759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148691867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74345943 + 74345944.

It is an arithmetic number, because the mean of its divisors is an integer number (74345944).

Almost surely, 2^148691887 is an apocalyptic number.

148691887 is a deficient number, since it is larger than the sum of its proper divisors (1).

148691887 is an equidigital number, since it uses as much as digits as its factorization.

148691887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 52.

The square root of 148691887 is about 12193.9282841913. The cubic root of 148691887 is about 529.7802423449.

The spelling of 148691887 in words is "one hundred forty-eight million, six hundred ninety-one thousand, eight hundred eighty-seven".