1840149317 has 2 divisors, whose sum is σ = 1840149318. Its totient is φ = 1840149316.

The previous prime is 1840149313. The next prime is 1840149323. The reversal of 1840149317 is 7139410481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1435576321 + 404572996 = 37889^2 + 20114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1840149317 - 2² = 1840149313 is a prime.

It is a super-2 number, since 2×1840149317² = 6772299017711132978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1840149313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920074658 + 920074659.

It is an arithmetic number, because the mean of its divisors is an integer number (920074659).

Almost surely, 2^1840149317 is an apocalyptic number.

It is an amenable number.

1840149317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840149317 is an equidigital number, since it uses as much as digits as its factorization.

1840149317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1840149317 is about 42896.9616290012. The cubic root of 1840149317 is about 1225.4182810390.

Adding to 1840149317 its reverse (7139410481), we get a palindrome (8979559798).

The spelling of 1840149317 in words is "one billion, eight hundred forty million, one hundred forty-nine thousand, three hundred seventeen".