1375649653 has 4 divisors (see below), whose sum is σ = 1572171040. Its totient is φ = 1179128268.

The previous prime is 1375649617. The next prime is 1375649663. The reversal of 1375649653 is 3569465731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1375649653 - 2²¹ = 1373552501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1375649597 and 1375649606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375649663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98260683 + ... + 98260696.

It is an arithmetic number, because the mean of its divisors is an integer number (393042760).

Almost surely, 2^1375649653 is an apocalyptic number.

It is an amenable number.

1375649653 is a deficient number, since it is larger than the sum of its proper divisors (196521387).

1375649653 is an equidigital number, since it uses as much as digits as its factorization.

1375649653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196521386.

The product of its digits is 2041200, while the sum is 49.

The square root of 1375649653 is about 37089.7513202771. The cubic root of 1375649653 is about 1112.1651468424.

The spelling of 1375649653 in words is "one billion, three hundred seventy-five million, six hundred forty-nine thousand, six hundred fifty-three".