313040402 has 4 divisors (see below), whose sum is σ = 469560606. Its totient is φ = 156520200.

The previous prime is 313040401. The next prime is 313040407. The reversal of 313040402 is 204040313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204040313 = 41 ⋅4976593.

It can be written as a sum of positive squares in only one way, i.e., 312264241 + 776161 = 17671^2 + 881^2 .

It is not an unprimeable number, because it can be changed into a prime (313040401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78260099 + ... + 78260102.

Almost surely, 2^313040402 is an apocalyptic number.

313040402 is a deficient number, since it is larger than the sum of its proper divisors (156520204).

313040402 is a wasteful number, since it uses less digits than its factorization.

313040402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156520203.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 313040402 is about 17692.9478041394. The cubic root of 313040402 is about 678.9953460075.

Adding to 313040402 its reverse (204040313), we get a palindrome (517080715).

The spelling of 313040402 in words is "three hundred thirteen million, forty thousand, four hundred two".