148931273 has 4 divisors (see below), whose sum is σ = 149257620. Its totient is φ = 148604928.

The previous prime is 148931257. The next prime is 148931287. The reversal of 148931273 is 372139841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372139841 = 31 ⋅12004511.

It can be written as a sum of positive squares in 2 ways, for example, as 51079609 + 97851664 = 7147^2 + 9892^2 .

It is a cyclic number.

It is not a de Polignac number, because 148931273 - 2⁴ = 148931257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148931173) 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, 162488 + ... + 163401.

It is an arithmetic number, because the mean of its divisors is an integer number (37314405).

Almost surely, 2^148931273 is an apocalyptic number.

It is an amenable number.

148931273 is a deficient number, since it is larger than the sum of its proper divisors (326347).

148931273 is an equidigital number, since it uses as much as digits as its factorization.

148931273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326346.

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

The square root of 148931273 is about 12203.7401234212. The cubic root of 148931273 is about 530.0643958779.

The spelling of 148931273 in words is "one hundred forty-eight million, nine hundred thirty-one thousand, two hundred seventy-three".