148400409 has 4 divisors (see below), whose sum is σ = 197867216. Its totient is φ = 98933604.

The previous prime is 148400407. The next prime is 148400489. The reversal of 148400409 is 904004841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 148400409 - 2¹ = 148400407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148400407) 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, 24733399 + ... + 24733404.

It is an arithmetic number, because the mean of its divisors is an integer number (49466804).

Almost surely, 2^148400409 is an apocalyptic number.

It is an amenable number.

148400409 is a deficient number, since it is larger than the sum of its proper divisors (49466807).

148400409 is an equidigital number, since it uses as much as digits as its factorization.

148400409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49466806.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 148400409 is about 12181.9706533877. The cubic root of 148400409 is about 529.4338430437.

The spelling of 148400409 in words is "one hundred forty-eight million, four hundred thousand, four hundred nine".