1654860049 has 2 divisors, whose sum is σ = 1654860050. Its totient is φ = 1654860048.

The previous prime is 1654860047. The next prime is 1654860079. The reversal of 1654860049 is 9400684561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1650959424 + 3900625 = 40632^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1654860049 - 2¹ = 1654860047 is a prime.

Together with 1654860047, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1654859987 and 1654860014.

It is not a weakly prime, because it can be changed into another prime (1654860041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827430024 + 827430025.

It is an arithmetic number, because the mean of its divisors is an integer number (827430025).

Almost surely, 2^1654860049 is an apocalyptic number.

It is an amenable number.

1654860049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1654860049 is an equidigital number, since it uses as much as digits as its factorization.

1654860049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1654860049 is about 40679.9711037262. The cubic root of 1654860049 is about 1182.8248058341.

The spelling of 1654860049 in words is "one billion, six hundred fifty-four million, eight hundred sixty thousand, forty-nine".