148649771 has 4 divisors (see below), whose sum is σ = 148675200. Its totient is φ = 148624344.

The previous prime is 148649747. The next prime is 148649773. The reversal of 148649771 is 177946841.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148649771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148649773) 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, 950 + ... + 17268.

It is an arithmetic number, because the mean of its divisors is an integer number (37168800).

Almost surely, 2^148649771 is an apocalyptic number.

148649771 is a deficient number, since it is larger than the sum of its proper divisors (25429).

148649771 is an equidigital number, since it uses as much as digits as its factorization.

148649771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25428.

The product of its digits is 338688, while the sum is 47.

The square root of 148649771 is about 12192.2012368563. The cubic root of 148649771 is about 529.7302186974.

The spelling of 148649771 in words is "one hundred forty-eight million, six hundred forty-nine thousand, seven hundred seventy-one".