1861140299 has 2 divisors, whose sum is σ = 1861140300. Its totient is φ = 1861140298.

The previous prime is 1861140257. The next prime is 1861140311. The reversal of 1861140299 is 9920411681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1861140299 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1861140599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930570149 + 930570150.

It is an arithmetic number, because the mean of its divisors is an integer number (930570150).

Almost surely, 2^1861140299 is an apocalyptic number.

1861140299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1861140299 is an equidigital number, since it uses as much as digits as its factorization.

1861140299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1861140299 is about 43140.9353051136. The cubic root of 1861140299 is about 1230.0602123122.

The spelling of 1861140299 in words is "one billion, eight hundred sixty-one million, one hundred forty thousand, two hundred ninety-nine".