1858494269 has 2 divisors, whose sum is σ = 1858494270. Its totient is φ = 1858494268.

The previous prime is 1858494263. The next prime is 1858494293. The reversal of 1858494269 is 9624948581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018248100 + 840246169 = 31910^2 + 28987^2 .

It is an emirp because it is prime and its reverse (9624948581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1858494269 is a prime.

It is a super-2 number, since 2×1858494269² = 6908001895811688722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1858494263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929247134 + 929247135.

It is an arithmetic number, because the mean of its divisors is an integer number (929247135).

Almost surely, 2^1858494269 is an apocalyptic number.

It is an amenable number.

1858494269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1858494269 is an equidigital number, since it uses as much as digits as its factorization.

1858494269 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 1858494269 is about 43110.2571205508. The cubic root of 1858494269 is about 1229.4769999826.

The spelling of 1858494269 in words is "one billion, eight hundred fifty-eight million, four hundred ninety-four thousand, two hundred sixty-nine".