1894249051 has 2 divisors, whose sum is σ = 1894249052. Its totient is φ = 1894249050.

The previous prime is 1894248989. The next prime is 1894249067. The reversal of 1894249051 is 1509424981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1894249051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1894248989 and 1894249007.

It is not a weakly prime, because it can be changed into another prime (1894249081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947124525 + 947124526.

It is an arithmetic number, because the mean of its divisors is an integer number (947124526).

Almost surely, 2^1894249051 is an apocalyptic number.

1894249051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894249051 is an equidigital number, since it uses as much as digits as its factorization.

1894249051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1894249051 is about 43522.9715322840. The cubic root of 1894249051 is about 1237.3114335817.

The spelling of 1894249051 in words is "one billion, eight hundred ninety-four million, two hundred forty-nine thousand, fifty-one".