147993842 has 4 divisors (see below), whose sum is σ = 221990766. Its totient is φ = 73996920.

The previous prime is 147993841. The next prime is 147993877. The reversal of 147993842 is 248399741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248399741 = 1723 ⋅144167.

It can be written as a sum of positive squares in only one way, i.e., 147598201 + 395641 = 12149^2 + 629^2 .

It is not an unprimeable number, because it can be changed into a prime (147993841) 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 as a sum of consecutive naturals, namely, 36998459 + ... + 36998462.

Almost surely, 2^147993842 is an apocalyptic number.

147993842 is a deficient number, since it is larger than the sum of its proper divisors (73996924).

147993842 is an equidigital number, since it uses as much as digits as its factorization.

147993842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73996923.

The product of its digits is 435456, while the sum is 47.

The square root of 147993842 is about 12165.2719657228. The cubic root of 147993842 is about 528.9499108642.

The spelling of 147993842 in words is "one hundred forty-seven million, nine hundred ninety-three thousand, eight hundred forty-two".