1345988737 has 2 divisors, whose sum is σ = 1345988738. Its totient is φ = 1345988736.

The previous prime is 1345988717. The next prime is 1345988759. The reversal of 1345988737 is 7378895431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1138657536 + 207331201 = 33744^2 + 14399^2 .

It is an emirp because it is prime and its reverse (7378895431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345988737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345988717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672994368 + 672994369.

It is an arithmetic number, because the mean of its divisors is an integer number (672994369).

Almost surely, 2^1345988737 is an apocalyptic number.

It is an amenable number.

1345988737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345988737 is an equidigital number, since it uses as much as digits as its factorization.

1345988737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The square root of 1345988737 is about 36687.7191577781. The cubic root of 1345988737 is about 1104.1137251680.

The spelling of 1345988737 in words is "one billion, three hundred forty-five million, nine hundred eighty-eight thousand, seven hundred thirty-seven".