1994362457 has 2 divisors, whose sum is σ = 1994362458. Its totient is φ = 1994362456.

The previous prime is 1994362373. The next prime is 1994362459. The reversal of 1994362457 is 7542634991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1754855881 + 239506576 = 41891^2 + 15476^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994362457 - 2²² = 1990168153 is a prime.

Together with 1994362459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1994362459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997181228 + 997181229.

It is an arithmetic number, because the mean of its divisors is an integer number (997181229).

Almost surely, 2^1994362457 is an apocalyptic number.

It is an amenable number.

1994362457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994362457 is an equidigital number, since it uses as much as digits as its factorization.

1994362457 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 1994362457 is about 44658.2854238718. The cubic root of 1994362457 is about 1258.7361260040.

The spelling of 1994362457 in words is "one billion, nine hundred ninety-four million, three hundred sixty-two thousand, four hundred fifty-seven".