1375210729 has 2 divisors, whose sum is σ = 1375210730. Its totient is φ = 1375210728.

The previous prime is 1375210721. The next prime is 1375210799. The reversal of 1375210729 is 9270125731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973128025 + 402082704 = 31195^2 + 20052^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375210729 - 2³ = 1375210721 is a prime.

It is a super-2 number, since 2×1375210729² = 3782409098313422882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1375210721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687605364 + 687605365.

It is an arithmetic number, because the mean of its divisors is an integer number (687605365).

Almost surely, 2^1375210729 is an apocalyptic number.

It is an amenable number.

1375210729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375210729 is an equidigital number, since it uses as much as digits as its factorization.

1375210729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 1375210729 is about 37083.8337958739. The cubic root of 1375210729 is about 1112.0468493042.

The spelling of 1375210729 in words is "one billion, three hundred seventy-five million, two hundred ten thousand, seven hundred twenty-nine".