148769891 has 2 divisors, whose sum is σ = 148769892. Its totient is φ = 148769890.

The previous prime is 148769861. The next prime is 148769897. The reversal of 148769891 is 198967841.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 148769891 - 2⁶ = 148769827 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (148769897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74384945 + 74384946.

It is an arithmetic number, because the mean of its divisors is an integer number (74384946).

Almost surely, 2^148769891 is an apocalyptic number.

148769891 is a deficient number, since it is larger than the sum of its proper divisors (1).

148769891 is an equidigital number, since it uses as much as digits as its factorization.

148769891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 53.

The square root of 148769891 is about 12197.1263418889. The cubic root of 148769891 is about 529.8728673352.

The spelling of 148769891 in words is "one hundred forty-eight million, seven hundred sixty-nine thousand, eight hundred ninety-one".