148471709 has 4 divisors (see below), whose sum is σ = 151273116. Its totient is φ = 145670304.

The previous prime is 148471699. The next prime is 148471823. The reversal of 148471709 is 907174841.

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 70644025 + 77827684 = 8405^2 + 8822^2 .

It is a cyclic number.

It is not a de Polignac number, because 148471709 - 2¹⁶ = 148406173 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 (148471109) 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, 1400624 + ... + 1400729.

It is an arithmetic number, because the mean of its divisors is an integer number (37818279).

Almost surely, 2^148471709 is an apocalyptic number.

It is an amenable number.

148471709 is a deficient number, since it is larger than the sum of its proper divisors (2801407).

148471709 is an equidigital number, since it uses as much as digits as its factorization.

148471709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801406.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 148471709 is about 12184.8967578720. The cubic root of 148471709 is about 529.5186195151.

The spelling of 148471709 in words is "one hundred forty-eight million, four hundred seventy-one thousand, seven hundred nine".