1885655137 has 2 divisors, whose sum is σ = 1885655138. Its totient is φ = 1885655136.

The previous prime is 1885655099. The next prime is 1885655173. The reversal of 1885655137 is 7315565881.

Together with next prime (1885655173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1532252736 + 353402401 = 39144^2 + 18799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1885655137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1885652137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 942827568 + 942827569.

It is an arithmetic number, because the mean of its divisors is an integer number (942827569).

Almost surely, 2^1885655137 is an apocalyptic number.

It is an amenable number.

1885655137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1885655137 is an equidigital number, since it uses as much as digits as its factorization.

1885655137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 49.

The square root of 1885655137 is about 43424.1308145598. The cubic root of 1885655137 is about 1235.4374333780.

The spelling of 1885655137 in words is "one billion, eight hundred eighty-five million, six hundred fifty-five thousand, one hundred thirty-seven".