1331426149 has 2 divisors, whose sum is σ = 1331426150. Its totient is φ = 1331426148.

The previous prime is 1331426147. The next prime is 1331426177. The reversal of 1331426149 is 9416241331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1142913249 + 188512900 = 33807^2 + 13730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331426149 - 2¹ = 1331426147 is a prime.

Together with 1331426147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331426147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665713074 + 665713075.

It is an arithmetic number, because the mean of its divisors is an integer number (665713075).

Almost surely, 2^1331426149 is an apocalyptic number.

It is an amenable number.

1331426149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331426149 is an equidigital number, since it uses as much as digits as its factorization.

1331426149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 1331426149 is about 36488.7126245912. The cubic root of 1331426149 is about 1100.1173838919.

The spelling of 1331426149 in words is "one billion, three hundred thirty-one million, four hundred twenty-six thousand, one hundred forty-nine".