1373252643 has 16 divisors (see below), whose sum is σ = 2325084160. Its totient is φ = 784715688.

The previous prime is 1373252641. The next prime is 1373252681. The reversal of 1373252643 is 3462523731.

1373252643 is a `hidden beast` number, since 1 + 3 + 7 + 3 + 2 + 5 + 2 + 643 = 666.

It is not a de Polignac number, because 1373252643 - 2¹ = 1373252641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1373252598 and 1373252607.

It is not an unprimeable number, because it can be changed into a prime (1373252641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3632755 + ... + 3633132.

It is an arithmetic number, because the mean of its divisors is an integer number (145317760).

Almost surely, 2^1373252643 is an apocalyptic number.

1373252643 is a deficient number, since it is larger than the sum of its proper divisors (951831517).

1373252643 is an equidigital number, since it uses as much as digits as its factorization.

1373252643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7265903 (or 7265897 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 1373252643 is about 37057.4235882637. The cubic root of 1373252643 is about 1111.5188047398.

It can be divided in two parts, 1373 and 252643, that added together give a square (254016 = 504²).

The spelling of 1373252643 in words is "one billion, three hundred seventy-three million, two hundred fifty-two thousand, six hundred forty-three".