1994407271 has 2 divisors, whose sum is σ = 1994407272. Its totient is φ = 1994407270.

The previous prime is 1994407213. The next prime is 1994407339. The reversal of 1994407271 is 1727044991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994407271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994407171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997203635 + 997203636.

It is an arithmetic number, because the mean of its divisors is an integer number (997203636).

Almost surely, 2^1994407271 is an apocalyptic number.

1994407271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994407271 is an equidigital number, since it uses as much as digits as its factorization.

1994407271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 1994407271 is about 44658.7871644540. The cubic root of 1994407271 is about 1258.7455540091.

The spelling of 1994407271 in words is "one billion, nine hundred ninety-four million, four hundred seven thousand, two hundred seventy-one".