312128629 has 4 divisors (see below), whose sum is σ = 312323040. Its totient is φ = 311934220.

The previous prime is 312128623. The next prime is 312128639. The reversal of 312128629 is 926821213.

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 312128629 - 2¹³ = 312120437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312128594 and 312128603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312128623) 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, 94777 + ... + 98014.

It is an arithmetic number, because the mean of its divisors is an integer number (78080760).

Almost surely, 2^312128629 is an apocalyptic number.

It is an amenable number.

312128629 is a deficient number, since it is larger than the sum of its proper divisors (194411).

312128629 is a wasteful number, since it uses less digits than its factorization.

312128629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194410.

The product of its digits is 10368, while the sum is 34.

The square root of 312128629 is about 17667.1624490182. The cubic root of 312128629 is about 678.3354826637.

The spelling of 312128629 in words is "three hundred twelve million, one hundred twenty-eight thousand, six hundred twenty-nine".