1201399313 has 4 divisors (see below), whose sum is σ = 1213063488. Its totient is φ = 1189735140.

The previous prime is 1201399291. The next prime is 1201399321. The reversal of 1201399313 is 3139931021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3139931021 = 47 ⋅66807043.

It is a cyclic number.

It is not a de Polignac number, because 1201399313 - 2⁶ = 1201399249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201399313.

It is not an unprimeable number, because it can be changed into a prime (1201395313) 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, 5831933 + ... + 5832138.

It is an arithmetic number, because the mean of its divisors is an integer number (303265872).

Almost surely, 2^1201399313 is an apocalyptic number.

It is an amenable number.

1201399313 is a deficient number, since it is larger than the sum of its proper divisors (11664175).

1201399313 is a wasteful number, since it uses less digits than its factorization.

1201399313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11664174.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 1201399313 is about 34661.2076102377. The cubic root of 1201399313 is about 1063.0714620531.

The spelling of 1201399313 in words is "one billion, two hundred one million, three hundred ninety-nine thousand, three hundred thirteen".