2129794157 has 2 divisors, whose sum is σ = 2129794158. Its totient is φ = 2129794156.

The previous prime is 2129794103. The next prime is 2129794267. The reversal of 2129794157 is 7514979212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2030313481 + 99480676 = 45059^2 + 9974^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129794157 - 2²⁰ = 2128745581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129734157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064897078 + 1064897079.

It is an arithmetic number, because the mean of its divisors is an integer number (1064897079).

Almost surely, 2^2129794157 is an apocalyptic number.

It is an amenable number.

2129794157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129794157 is an equidigital number, since it uses as much as digits as its factorization.

2129794157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 2129794157 is about 46149.6929242222. The cubic root of 2129794157 is about 1286.6069026966.

The spelling of 2129794157 in words is "two billion, one hundred twenty-nine million, seven hundred ninety-four thousand, one hundred fifty-seven".