1409157991 has 2 divisors, whose sum is σ = 1409157992. Its totient is φ = 1409157990.

The previous prime is 1409157973. The next prime is 1409158013. The reversal of 1409157991 is 1997519041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1409157991 - 2¹³ = 1409149799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1409157791) 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 as a sum of consecutive naturals, namely, 704578995 + 704578996.

It is an arithmetic number, because the mean of its divisors is an integer number (704578996).

Almost surely, 2^1409157991 is an apocalyptic number.

1409157991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1409157991 is an equidigital number, since it uses as much as digits as its factorization.

1409157991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 46.

The square root of 1409157991 is about 37538.7531892044. The cubic root of 1409157991 is about 1121.1229147624.

The spelling of 1409157991 in words is "one billion, four hundred nine million, one hundred fifty-seven thousand, nine hundred ninety-one".