148191998 has 4 divisors (see below), whose sum is σ = 222288000. Its totient is φ = 74095998.

The previous prime is 148191991. The next prime is 148192021. The reversal of 148191998 is 899191841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899191841 = 587 ⋅1531843.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148191991) 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 as a sum of consecutive naturals, namely, 37047998 + ... + 37048001.

It is an arithmetic number, because the mean of its divisors is an integer number (55572000).

Almost surely, 2^148191998 is an apocalyptic number.

148191998 is a deficient number, since it is larger than the sum of its proper divisors (74096002).

148191998 is an equidigital number, since it uses as much as digits as its factorization.

148191998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74096001.

The product of its digits is 186624, while the sum is 50.

The square root of 148191998 is about 12173.4135722073. The cubic root of 148191998 is about 529.1858843153.

The spelling of 148191998 in words is "one hundred forty-eight million, one hundred ninety-one thousand, nine hundred ninety-eight".