148890389 has 4 divisors (see below), whose sum is σ = 148971756. Its totient is φ = 148809024.

The previous prime is 148890383. The next prime is 148890449. The reversal of 148890389 is 983098841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983098841 = 271 ⋅3627671.

It can be written as a sum of positive squares in 2 ways, for example, as 61748164 + 87142225 = 7858^2 + 9335^2 .

It is a cyclic number.

It is not a de Polignac number, because 148890389 - 2⁴ = 148890373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148890383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37874 + ... + 41619.

It is an arithmetic number, because the mean of its divisors is an integer number (37242939).

Almost surely, 2^148890389 is an apocalyptic number.

It is an amenable number.

148890389 is a deficient number, since it is larger than the sum of its proper divisors (81367).

148890389 is an equidigital number, since it uses as much as digits as its factorization.

148890389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81366.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 148890389 is about 12202.0649481963. The cubic root of 148890389 is about 530.0158877402.

The spelling of 148890389 in words is "one hundred forty-eight million, eight hundred ninety thousand, three hundred eighty-nine".