148989021 has 4 divisors (see below), whose sum is σ = 198652032. Its totient is φ = 99326012.

The previous prime is 148989019. The next prime is 148989053. The reversal of 148989021 is 120989841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 148989021 - 2¹ = 148989019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148989091) 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 in 3 ways as a sum of consecutive naturals, for example, 24831501 + ... + 24831506.

It is an arithmetic number, because the mean of its divisors is an integer number (49663008).

Almost surely, 2^148989021 is an apocalyptic number.

It is an amenable number.

148989021 is a deficient number, since it is larger than the sum of its proper divisors (49663011).

148989021 is an equidigital number, since it uses as much as digits as its factorization.

148989021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49663010.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 148989021 is about 12206.1058900863. The cubic root of 148989021 is about 530.1328977280.

The spelling of 148989021 in words is "one hundred forty-eight million, nine hundred eighty-nine thousand, twenty-one".