1909455131 has 2 divisors, whose sum is σ = 1909455132. Its totient is φ = 1909455130.

The previous prime is 1909455127. The next prime is 1909455139. The reversal of 1909455131 is 1315549091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1909455131 - 2² = 1909455127 is a prime.

It is a super-2 number, since 2×1909455131² = 7292037794604454322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1909455139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954727565 + 954727566.

It is an arithmetic number, because the mean of its divisors is an integer number (954727566).

Almost surely, 2^1909455131 is an apocalyptic number.

1909455131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909455131 is an equidigital number, since it uses as much as digits as its factorization.

1909455131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 1909455131 is about 43697.3126290393. The cubic root of 1909455131 is about 1240.6134518832.

The spelling of 1909455131 in words is "one billion, nine hundred nine million, four hundred fifty-five thousand, one hundred thirty-one".