148373921 has 2 divisors, whose sum is σ = 148373922. Its totient is φ = 148373920.

The previous prime is 148373917. The next prime is 148373923. The reversal of 148373921 is 129373841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105863521 + 42510400 = 10289^2 + 6520^2 .

It is a cyclic number.

It is not a de Polignac number, because 148373921 - 2² = 148373917 is a prime.

Together with 148373923, 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 (148373923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74186960 + 74186961.

It is an arithmetic number, because the mean of its divisors is an integer number (74186961).

Almost surely, 2^148373921 is an apocalyptic number.

It is an amenable number.

148373921 is a deficient number, since it is larger than the sum of its proper divisors (1).

148373921 is an equidigital number, since it uses as much as digits as its factorization.

148373921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 148373921 is about 12180.8834244483. The cubic root of 148373921 is about 529.4023416074.

The spelling of 148373921 in words is "one hundred forty-eight million, three hundred seventy-three thousand, nine hundred twenty-one".