1906471969 has 2 divisors, whose sum is σ = 1906471970. Its totient is φ = 1906471968.

The previous prime is 1906471901. The next prime is 1906471981. The reversal of 1906471969 is 9691746091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906457569 + 14400 = 43663^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906471969 - 2⁷ = 1906471841 is a prime.

It is a super-2 number, since 2×1906471969² = 7269270737165473922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1906472969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953235984 + 953235985.

It is an arithmetic number, because the mean of its divisors is an integer number (953235985).

Almost surely, 2^1906471969 is an apocalyptic number.

It is an amenable number.

1906471969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906471969 is an equidigital number, since it uses as much as digits as its factorization.

1906471969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 1906471969 is about 43663.1648990313. The cubic root of 1906471969 is about 1239.9670406172.

The spelling of 1906471969 in words is "one billion, nine hundred six million, four hundred seventy-one thousand, nine hundred sixty-nine".