11902995391 has 4 divisors (see below), whose sum is σ = 13603423312. Its totient is φ = 10202567472.

The previous prime is 11902995373. The next prime is 11902995427. The reversal of 11902995391 is 19359920911.

It is a happy number.

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 11902995391 - 2³¹ = 9755511743 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 (11902995311) 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, 850213950 + ... + 850213963.

It is an arithmetic number, because the mean of its divisors is an integer number (3400855828).

Almost surely, 2^11902995391 is an apocalyptic number.

11902995391 is a deficient number, since it is larger than the sum of its proper divisors (1700427921).

11902995391 is an equidigital number, since it uses as much as digits as its factorization.

11902995391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700427920.

The product of its (nonzero) digits is 196830, while the sum is 49.

The spelling of 11902995391 in words is "eleven billion, nine hundred two million, nine hundred ninety-five thousand, three hundred ninety-one".