1890460457 has 2 divisors, whose sum is σ = 1890460458. Its totient is φ = 1890460456.

The previous prime is 1890460447. The next prime is 1890460489. The reversal of 1890460457 is 7540640981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1420611481 + 469848976 = 37691^2 + 21676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890460457 - 2¹⁰ = 1890459433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1890460417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945230228 + 945230229.

It is an arithmetic number, because the mean of its divisors is an integer number (945230229).

Almost surely, 2^1890460457 is an apocalyptic number.

It is an amenable number.

1890460457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890460457 is an equidigital number, since it uses as much as digits as its factorization.

1890460457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1890460457 is about 43479.4256746797. The cubic root of 1890460457 is about 1236.4859878567.

The spelling of 1890460457 in words is "one billion, eight hundred ninety million, four hundred sixty thousand, four hundred fifty-seven".