1371729641 has 4 divisors (see below), whose sum is σ = 1390520532. Its totient is φ = 1352938752.

The previous prime is 1371729617. The next prime is 1371729649. The reversal of 1371729641 is 1469271731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1469271731 = 163 ⋅9013937.

It can be written as a sum of positive squares in 2 ways, for example, as 567440041 + 804289600 = 23821^2 + 28360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1371729641 - 2⁶ = 1371729577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371729649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9395336 + ... + 9395481.

It is an arithmetic number, because the mean of its divisors is an integer number (347630133).

Almost surely, 2^1371729641 is an apocalyptic number.

It is an amenable number.

1371729641 is a deficient number, since it is larger than the sum of its proper divisors (18790891).

1371729641 is an equidigital number, since it uses as much as digits as its factorization.

1371729641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18790890.

The product of its digits is 63504, while the sum is 41.

The square root of 1371729641 is about 37036.8686716358. The cubic root of 1371729641 is about 1111.1077438005.

The spelling of 1371729641 in words is "one billion, three hundred seventy-one million, seven hundred twenty-nine thousand, six hundred forty-one".