1864598249 has 2 divisors, whose sum is σ = 1864598250. Its totient is φ = 1864598248.

The previous prime is 1864598227. The next prime is 1864598251. The reversal of 1864598249 is 9428954681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1864512400 + 85849 = 43180^2 + 293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1864598249 is a prime.

It is a super-3 number, since 3×1864598249³ (a number of 29 digits) contains 333 as substring.

Together with 1864598251, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1864598194 and 1864598203.

It is not a weakly prime, because it can be changed into another prime (1864591249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932299124 + 932299125.

It is an arithmetic number, because the mean of its divisors is an integer number (932299125).

Almost surely, 2^1864598249 is an apocalyptic number.

It is an amenable number.

1864598249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864598249 is an equidigital number, since it uses as much as digits as its factorization.

1864598249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 56.

The square root of 1864598249 is about 43180.9940714662. The cubic root of 1864598249 is about 1230.8215475611.

The spelling of 1864598249 in words is "one billion, eight hundred sixty-four million, five hundred ninety-eight thousand, two hundred forty-nine".