1855125997 has 2 divisors, whose sum is σ = 1855125998. Its totient is φ = 1855125996.

The previous prime is 1855125941. The next prime is 1855126033. The reversal of 1855125997 is 7995215581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1179853801 + 675272196 = 34349^2 + 25986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855125997 - 2²⁷ = 1720908269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1855125917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927562998 + 927562999.

It is an arithmetic number, because the mean of its divisors is an integer number (927562999).

Almost surely, 2^1855125997 is an apocalyptic number.

It is an amenable number.

1855125997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855125997 is an equidigital number, since it uses as much as digits as its factorization.

1855125997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 52.

The square root of 1855125997 is about 43071.1736199514. The cubic root of 1855125997 is about 1228.7337966732.

The spelling of 1855125997 in words is "one billion, eight hundred fifty-five million, one hundred twenty-five thousand, nine hundred ninety-seven".