2139797546 has 4 divisors (see below), whose sum is σ = 3209696322. Its totient is φ = 1069898772.

The previous prime is 2139797533. The next prime is 2139797549. The reversal of 2139797546 is 6457979312.

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

It can be written as a sum of positive squares in only one way, i.e., 1939433521 + 200364025 = 44039^2 + 14155^2 .

It is not an unprimeable number, because it can be changed into a prime (2139797549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534949385 + ... + 534949388.

Almost surely, 2^2139797546 is an apocalyptic number.

2139797546 is a deficient number, since it is larger than the sum of its proper divisors (1069898776).

2139797546 is a wasteful number, since it uses less digits than its factorization.

2139797546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069898775.

The product of its digits is 2857680, while the sum is 53.

The square root of 2139797546 is about 46257.9457607015. The cubic root of 2139797546 is about 1288.6181035476.

The spelling of 2139797546 in words is "two billion, one hundred thirty-nine million, seven hundred ninety-seven thousand, five hundred forty-six".