177894994139 has 2 divisors, whose sum is σ = 177894994140. Its totient is φ = 177894994138.

The previous prime is 177894994129. The next prime is 177894994171. The reversal of 177894994139 is 931499498771.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-177894994139 is a prime.

It is not a weakly prime, because it can be changed into another prime (177894994129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 88947497069 + 88947497070.

It is an arithmetic number, because the mean of its divisors is an integer number (88947497070).

Almost surely, 2^177894994139 is an apocalyptic number.

177894994139 is a deficient number, since it is larger than the sum of its proper divisors (1).

177894994139 is an equidigital number, since it uses as much as digits as its factorization.

177894994139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123451776, while the sum is 71.

The spelling of 177894994139 in words is "one hundred seventy-seven billion, eight hundred ninety-four million, nine hundred ninety-four thousand, one hundred thirty-nine".