1040401091 has 2 divisors, whose sum is σ = 1040401092. Its totient is φ = 1040401090.

The previous prime is 1040401009. The next prime is 1040401133. The reversal of 1040401091 is 1901040401.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1040401091 - 2¹⁸ = 1040138947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1040401001) 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, 520200545 + 520200546.

It is an arithmetic number, because the mean of its divisors is an integer number (520200546).

Almost surely, 2^1040401091 is an apocalyptic number.

1040401091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040401091 is an equidigital number, since it uses as much as digits as its factorization.

1040401091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1040401091 is about 32255.2490456980. The cubic root of 1040401091 is about 1013.2896335923.

Adding to 1040401091 its reverse (1901040401), we get a palindrome (2941441492).

The spelling of 1040401091 in words is "one billion, forty million, four hundred one thousand, ninety-one".