148639877 has 4 divisors (see below), whose sum is σ = 153765420. Its totient is φ = 143514336.

The previous prime is 148639847. The next prime is 148639889. The reversal of 148639877 is 778936841.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67387681 + 81252196 = 8209^2 + 9014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148639877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148639817) 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, 2562728 + ... + 2562785.

It is an arithmetic number, because the mean of its divisors is an integer number (38441355).

Almost surely, 2^148639877 is an apocalyptic number.

It is an amenable number.

148639877 is a deficient number, since it is larger than the sum of its proper divisors (5125543).

148639877 is an equidigital number, since it uses as much as digits as its factorization.

148639877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125542.

The product of its digits is 2032128, while the sum is 53.

The square root of 148639877 is about 12191.7954789276. The cubic root of 148639877 is about 529.7184656418.

The spelling of 148639877 in words is "one hundred forty-eight million, six hundred thirty-nine thousand, eight hundred seventy-seven".