1933138688731 has 4 divisors (see below), whose sum is σ = 1933145746000. Its totient is φ = 1933131631464.

The previous prime is 1933138688641. The next prime is 1933138688749. The reversal of 1933138688731 is 1378868313391.

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 1933138688731 - 2⁷ = 1933138688603 is a prime.

It is a super-2 number, since 2×1933138688731² (a number of 25 digits) contains 22 as substring.

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 1933138688731.

It is not an unprimeable number, because it can be changed into a prime (1933138689731) 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, 3100431 + ... + 3671368.

It is an arithmetic number, because the mean of its divisors is an integer number (483286436500).

Almost surely, 2^{1933138688731} is an apocalyptic number.

1933138688731 is a deficient number, since it is larger than the sum of its proper divisors (7057269).

1933138688731 is an equidigital number, since it uses as much as digits as its factorization.

1933138688731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7057268.

The product of its digits is 15676416, while the sum is 61.

The spelling of 1933138688731 in words is "one trillion, nine hundred thirty-three billion, one hundred thirty-eight million, six hundred eighty-eight thousand, seven hundred thirty-one".