1331774137 has 4 divisors (see below), whose sum is σ = 1354346640. Its totient is φ = 1309201636.

The previous prime is 1331774131. The next prime is 1331774153. The reversal of 1331774137 is 7314771331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1331774137 - 2¹⁹ = 1331249849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331774096 and 1331774105.

It is not an unprimeable number, because it can be changed into a prime (1331774131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11286163 + ... + 11286280.

It is an arithmetic number, because the mean of its divisors is an integer number (338586660).

Almost surely, 2^1331774137 is an apocalyptic number.

It is an amenable number.

1331774137 is a deficient number, since it is larger than the sum of its proper divisors (22572503).

1331774137 is an equidigital number, since it uses as much as digits as its factorization.

1331774137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22572502.

The product of its digits is 37044, while the sum is 37.

The square root of 1331774137 is about 36493.4807465662. The cubic root of 1331774137 is about 1100.2132195493.

The spelling of 1331774137 in words is "one billion, three hundred thirty-one million, seven hundred seventy-four thousand, one hundred thirty-seven".