1894849469 has 2 divisors, whose sum is σ = 1894849470. Its totient is φ = 1894849468.

The previous prime is 1894849447. The next prime is 1894849471. The reversal of 1894849469 is 9649484981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1427857369 + 466992100 = 37787^2 + 21610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1894849469 is a prime.

It is a super-2 number, since 2×1894849469² = 7180909020339163922, which contains 22 as substring.

Together with 1894849471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1894869469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947424734 + 947424735.

It is an arithmetic number, because the mean of its divisors is an integer number (947424735).

Almost surely, 2^1894849469 is an apocalyptic number.

It is an amenable number.

1894849469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894849469 is an equidigital number, since it uses as much as digits as its factorization.

1894849469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 62.

The square root of 1894849469 is about 43529.8686995493. The cubic root of 1894849469 is about 1237.4421495114.

The spelling of 1894849469 in words is "one billion, eight hundred ninety-four million, eight hundred forty-nine thousand, four hundred sixty-nine".