1906001001 has 6 divisors (see below), whose sum is σ = 2753112570. Its totient is φ = 1270667328.

The previous prime is 1906000981. The next prime is 1906001003. The reversal of 1906001001 is 1001006091.

It can be written as a sum of positive squares in only one way, i.e., 1051315776 + 854685225 = 32424^2 + 29235^2 .

It is not a de Polignac number, because 1906001001 - 2¹⁴ = 1905984617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1906001003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105888936 + ... + 105888953.

It is an arithmetic number, because the mean of its divisors is an integer number (458852095).

Almost surely, 2^1906001001 is an apocalyptic number.

It is an amenable number.

1906001001 is a deficient number, since it is larger than the sum of its proper divisors (847111569).

1906001001 is a wasteful number, since it uses less digits than its factorization.

1906001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211777895 (or 211777892 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1906001001 is about 43657.7713700551. The cubic root of 1906001001 is about 1239.8649265374.

Adding to 1906001001 its reverse (1001006091), we get a palindrome (2907007092).

The spelling of 1906001001 in words is "one billion, nine hundred six million, one thousand, one".