1853402197 has 2 divisors, whose sum is σ = 1853402198. Its totient is φ = 1853402196.

The previous prime is 1853402189. The next prime is 1853402249. The reversal of 1853402197 is 7912043581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327800721 + 525601476 = 36439^2 + 22926^2 .

It is a cyclic number.

It is not a de Polignac number, because 1853402197 - 2³ = 1853402189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1853402167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 926701098 + 926701099.

It is an arithmetic number, because the mean of its divisors is an integer number (926701099).

Almost surely, 2^1853402197 is an apocalyptic number.

It is an amenable number.

1853402197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1853402197 is an equidigital number, since it uses as much as digits as its factorization.

1853402197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1853402197 is about 43051.1579054501. The cubic root of 1853402197 is about 1228.3530951807.

The spelling of 1853402197 in words is "one billion, eight hundred fifty-three million, four hundred two thousand, one hundred ninety-seven".