1199403947 has 4 divisors (see below), whose sum is σ = 1370747376. Its totient is φ = 1028060520.

The previous prime is 1199403929. The next prime is 1199403967. The reversal of 1199403947 is 7493049911.

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 1199403947 - 2⁶ = 1199403883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1199403967) 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, 85671704 + ... + 85671717.

It is an arithmetic number, because the mean of its divisors is an integer number (342686844).

Almost surely, 2^1199403947 is an apocalyptic number.

1199403947 is a deficient number, since it is larger than the sum of its proper divisors (171343429).

1199403947 is an equidigital number, since it uses as much as digits as its factorization.

1199403947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171343428.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1199403947 is about 34632.4117987760. The cubic root of 1199403947 is about 1062.4825953689.

The spelling of 1199403947 in words is "one billion, one hundred ninety-nine million, four hundred three thousand, nine hundred forty-seven".