128629093 has 4 divisors (see below), whose sum is σ = 128651788. Its totient is φ = 128606400.

The previous prime is 128629091. The next prime is 128629097. The reversal of 128629093 is 390926821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 390926821 = 11833 ⋅33037.

It can be written as a sum of positive squares in 2 ways, for example, as 60186564 + 68442529 = 7758^2 + 8273^2 .

It is a cyclic number.

It is not a de Polignac number, because 128629093 - 2¹ = 128629091 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 (128629091) 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, 5143 + ... + 16843.

It is an arithmetic number, because the mean of its divisors is an integer number (32162947).

Almost surely, 2^128629093 is an apocalyptic number.

It is an amenable number.

128629093 is a deficient number, since it is larger than the sum of its proper divisors (22695).

128629093 is a wasteful number, since it uses less digits than its factorization.

128629093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22694.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 128629093 is about 11341.4766675244. The cubic root of 128629093 is about 504.7927038615.

The spelling of 128629093 in words is "one hundred twenty-eight million, six hundred twenty-nine thousand, ninety-three".