1988165051 has 2 divisors, whose sum is σ = 1988165052. Its totient is φ = 1988165050.

The previous prime is 1988165041. The next prime is 1988165089. The reversal of 1988165051 is 1505618891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1988165051 - 2⁶ = 1988164987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1988164993 and 1988165011.

It is not a weakly prime, because it can be changed into another prime (1988165041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994082525 + 994082526.

It is an arithmetic number, because the mean of its divisors is an integer number (994082526).

Almost surely, 2^1988165051 is an apocalyptic number.

1988165051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988165051 is an equidigital number, since it uses as much as digits as its factorization.

1988165051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 44.

The square root of 1988165051 is about 44588.8444680954. The cubic root of 1988165051 is about 1257.4309481507.

The spelling of 1988165051 in words is "one billion, nine hundred eighty-eight million, one hundred sixty-five thousand, fifty-one".