1949987540929 has 4 divisors (see below), whose sum is σ = 1950415080580. Its totient is φ = 1949560001280.

The previous prime is 1949987540911. The next prime is 1949987540951. The reversal of 1949987540929 is 9290457899491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 866431457329 + 1083556083600 = 930823^2 + 1040940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1949987540929 - 2⁷ = 1949987540801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949981540929) 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, 213762984 + ... + 213772105.

It is an arithmetic number, because the mean of its divisors is an integer number (487603770145).

Almost surely, 2^{1949987540929} is an apocalyptic number.

It is an amenable number.

1949987540929 is a deficient number, since it is larger than the sum of its proper divisors (427539651).

1949987540929 is an equidigital number, since it uses as much as digits as its factorization.

1949987540929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427539650.

The product of its (nonzero) digits is 529079040, while the sum is 76.

The spelling of 1949987540929 in words is "one trillion, nine hundred forty-nine billion, nine hundred eighty-seven million, five hundred forty thousand, nine hundred twenty-nine".