2139694547 has 2 divisors, whose sum is σ = 2139694548. Its totient is φ = 2139694546.

The previous prime is 2139694541. The next prime is 2139694561. The reversal of 2139694547 is 7454969312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139694547 - 2⁶ = 2139694483 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2139694495 and 2139694504.

It is not a weakly prime, because it can be changed into another prime (2139694541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069847273 + 1069847274.

It is an arithmetic number, because the mean of its divisors is an integer number (1069847274).

Almost surely, 2^2139694547 is an apocalyptic number.

2139694547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139694547 is an equidigital number, since it uses as much as digits as its factorization.

2139694547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 2139694547 is about 46256.8324358683. The cubic root of 2139694547 is about 1288.5974273695.

The spelling of 2139694547 in words is "two billion, one hundred thirty-nine million, six hundred ninety-four thousand, five hundred forty-seven".