1375556493 has 4 divisors (see below), whose sum is σ = 1834075328. Its totient is φ = 917037660.

The previous prime is 1375556491. The next prime is 1375556531. The reversal of 1375556493 is 3946555731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3946555731 = 3 ⋅1315518577.

It is not a de Polignac number, because 1375556493 - 2¹ = 1375556491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375556491) 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, 229259413 + ... + 229259418.

It is an arithmetic number, because the mean of its divisors is an integer number (458518832).

Almost surely, 2^1375556493 is an apocalyptic number.

It is an amenable number.

1375556493 is a deficient number, since it is larger than the sum of its proper divisors (458518835).

1375556493 is an equidigital number, since it uses as much as digits as its factorization.

1375556493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458518834.

The product of its digits is 1701000, while the sum is 48.

The square root of 1375556493 is about 37088.4954264796. The cubic root of 1375556493 is about 1112.1400407301.

The spelling of 1375556493 in words is "one billion, three hundred seventy-five million, five hundred fifty-six thousand, four hundred ninety-three".