148491639 has 18 divisors (see below), whose sum is σ = 217679280. Its totient is φ = 97527456.

The previous prime is 148491587. The next prime is 148491653. The reversal of 148491639 is 936194841.

148491639 is a `hidden beast` number, since 1 + 4 + 8 + 4 + 9 + 1 + 639 = 666.

It is not a de Polignac number, because 148491639 - 2²⁴ = 131714423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 148491594 and 148491603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148491689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 324699 + ... + 325155.

Almost surely, 2^148491639 is an apocalyptic number.

148491639 is a deficient number, since it is larger than the sum of its proper divisors (69187641).

148491639 is an frugal number, since it uses more digits than its factorization.

148491639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 539 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 148491639 is about 12185.7145461397. The cubic root of 148491639 is about 529.5423116469.

The spelling of 148491639 in words is "one hundred forty-eight million, four hundred ninety-one thousand, six hundred thirty-nine".