1610898491 has 2 divisors, whose sum is σ = 1610898492. Its totient is φ = 1610898490.

The previous prime is 1610898361. The next prime is 1610898503. The reversal of 1610898491 is 1948980161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1610898491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1610895491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805449245 + 805449246.

It is an arithmetic number, because the mean of its divisors is an integer number (805449246).

Almost surely, 2^1610898491 is an apocalyptic number.

1610898491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1610898491 is an equidigital number, since it uses as much as digits as its factorization.

1610898491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 1610898491 is about 40135.9999377118. Note that the first 4 decimals coincide. The cubic root of 1610898491 is about 1172.2567034586.

The spelling of 1610898491 in words is "one billion, six hundred ten million, eight hundred ninety-eight thousand, four hundred ninety-one".