128849037 has 4 divisors (see below), whose sum is σ = 171798720. Its totient is φ = 85899356.

The previous prime is 128849023. The next prime is 128849047. The reversal of 128849037 is 730948821.

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 a cyclic number.

It is not a de Polignac number, because 128849037 - 2⁸ = 128848781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128849037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128849047) 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, 21474837 + ... + 21474842.

It is an arithmetic number, because the mean of its divisors is an integer number (42949680).

Almost surely, 2^128849037 is an apocalyptic number.

It is an amenable number.

128849037 is a deficient number, since it is larger than the sum of its proper divisors (42949683).

128849037 is an equidigital number, since it uses as much as digits as its factorization.

128849037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42949682.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 128849037 is about 11351.1689706391. The cubic root of 128849037 is about 505.0802564993.

The spelling of 128849037 in words is "one hundred twenty-eight million, eight hundred forty-nine thousand, thirty-seven".