312506407 has 4 divisors (see below), whose sum is σ = 323282520. Its totient is φ = 301730296.

The previous prime is 312506353. The next prime is 312506417. The reversal of 312506407 is 704605213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312506407 - 2¹⁹ = 311982119 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 (312506417) 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, 5388013 + ... + 5388070.

It is an arithmetic number, because the mean of its divisors is an integer number (80820630).

Almost surely, 2^312506407 is an apocalyptic number.

312506407 is a deficient number, since it is larger than the sum of its proper divisors (10776113).

312506407 is a wasteful number, since it uses less digits than its factorization.

312506407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10776112.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 312506407 is about 17677.8507460607. The cubic root of 312506407 is about 678.6090417900.

The spelling of 312506407 in words is "three hundred twelve million, five hundred six thousand, four hundred seven".