1842772493 has 2 divisors, whose sum is σ = 1842772494. Its totient is φ = 1842772492.

The previous prime is 1842772471. The next prime is 1842772517. The reversal of 1842772493 is 3942772481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149345604 + 693426889 = 33902^2 + 26333^2 .

It is a cyclic number.

It is not a de Polignac number, because 1842772493 - 2⁸ = 1842772237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1842772793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921386246 + 921386247.

It is an arithmetic number, because the mean of its divisors is an integer number (921386247).

Almost surely, 2^1842772493 is an apocalyptic number.

It is an amenable number.

1842772493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1842772493 is an equidigital number, since it uses as much as digits as its factorization.

1842772493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 1842772493 is about 42927.5260526390. The cubic root of 1842772493 is about 1226.0002920677. Note that the first 3 decimals are identical.

The spelling of 1842772493 in words is "one billion, eight hundred forty-two million, seven hundred seventy-two thousand, four hundred ninety-three".