13950987919 has 4 divisors (see below), whose sum is σ = 15219259560. Its totient is φ = 12682716280.

The previous prime is 13950987901. The next prime is 13950987923. The reversal of 13950987919 is 91978905931.

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 13950987919 - 2⁵ = 13950987887 is a prime.

It is a super-2 number, since 2×13950987919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13950987989) 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, 634135804 + ... + 634135825.

It is an arithmetic number, because the mean of its divisors is an integer number (3804814890).

Almost surely, 2^13950987919 is an apocalyptic number.

13950987919 is a deficient number, since it is larger than the sum of its proper divisors (1268271641).

13950987919 is a wasteful number, since it uses less digits than its factorization.

13950987919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268271640.

The product of its (nonzero) digits is 5511240, while the sum is 61.

The spelling of 13950987919 in words is "thirteen billion, nine hundred fifty million, nine hundred eighty-seven thousand, nine hundred nineteen".