148821643 has 2 divisors, whose sum is σ = 148821644. Its totient is φ = 148821642.

The previous prime is 148821641. The next prime is 148821653. The reversal of 148821643 is 346128841.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 148821643 - 2¹ = 148821641 is a prime.

Together with 148821641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (148821641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74410821 + 74410822.

It is an arithmetic number, because the mean of its divisors is an integer number (74410822).

Almost surely, 2^148821643 is an apocalyptic number.

148821643 is a deficient number, since it is larger than the sum of its proper divisors (1).

148821643 is an equidigital number, since it uses as much as digits as its factorization.

148821643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 37.

The square root of 148821643 is about 12199.2476407359. The cubic root of 148821643 is about 529.9343018126.

The spelling of 148821643 in words is "one hundred forty-eight million, eight hundred twenty-one thousand, six hundred forty-three".