1347531961 has 2 divisors, whose sum is σ = 1347531962. Its totient is φ = 1347531960.

The previous prime is 1347531959. The next prime is 1347532007. The reversal of 1347531961 is 1691357431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1039740025 + 307791936 = 32245^2 + 17544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347531961 - 2¹ = 1347531959 is a prime.

Together with 1347531959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1347531161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673765980 + 673765981.

It is an arithmetic number, because the mean of its divisors is an integer number (673765981).

Almost surely, 2^1347531961 is an apocalyptic number.

It is an amenable number.

1347531961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1347531961 is an equidigital number, since it uses as much as digits as its factorization.

1347531961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 1347531961 is about 36708.7450207713. The cubic root of 1347531961 is about 1104.5355325663.

The spelling of 1347531961 in words is "one billion, three hundred forty-seven million, five hundred thirty-one thousand, nine hundred sixty-one".