148933921 has 2 divisors, whose sum is σ = 148933922. Its totient is φ = 148933920.

The previous prime is 148933919. The next prime is 148933927. The reversal of 148933921 is 129339841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104857600 + 44076321 = 10240^2 + 6639^2 .

It is a cyclic number.

It is not a de Polignac number, because 148933921 - 2¹ = 148933919 is a prime.

Together with 148933919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (148933927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74466960 + 74466961.

It is an arithmetic number, because the mean of its divisors is an integer number (74466961).

Almost surely, 2^148933921 is an apocalyptic number.

It is an amenable number.

148933921 is a deficient number, since it is larger than the sum of its proper divisors (1).

148933921 is an equidigital number, since it uses as much as digits as its factorization.

148933921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 148933921 is about 12203.8486142692. The cubic root of 148933921 is about 530.0675373766.

The spelling of 148933921 in words is "one hundred forty-eight million, nine hundred thirty-three thousand, nine hundred twenty-one".