1906226091 has 48 divisors (see below), whose sum is σ = 3613559040. Its totient is φ = 938122560.

The previous prime is 1906226089. The next prime is 1906226137.

1906226091 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1906226091 - 2¹ = 1906226089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1906226011) 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 in 47 ways as a sum of consecutive naturals, for example, 59220 + ... + 85553.

It is an arithmetic number, because the mean of its divisors is an integer number (75282480).

Almost surely, 2^1906226091 is an apocalyptic number.

1906226091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1906226091 is a deficient number, since it is larger than the sum of its proper divisors (1707332949).

1906226091 is a wasteful number, since it uses less digits than its factorization.

1906226091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144816 (or 144813 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1906226091 is about 43660.3491855024. The cubic root of 1906226091 is about 1239.9137320751.

The spelling of 1906226091 in words is "one billion, nine hundred six million, two hundred twenty-six thousand, ninety-one".