127440393 has 4 divisors (see below), whose sum is σ = 169920528. Its totient is φ = 84960260.

The previous prime is 127440371. The next prime is 127440419. The reversal of 127440393 is 393044721.

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: 393044721 = 3 ⋅131014907.

It is a cyclic number.

It is not a de Polignac number, because 127440393 - 2⁶ = 127440329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127440323) 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, 21240063 + ... + 21240068.

It is an arithmetic number, because the mean of its divisors is an integer number (42480132).

Almost surely, 2^127440393 is an apocalyptic number.

It is an amenable number.

127440393 is a deficient number, since it is larger than the sum of its proper divisors (42480135).

127440393 is an equidigital number, since it uses as much as digits as its factorization.

127440393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42480134.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 127440393 is about 11288.9500397513. The cubic root of 127440393 is about 503.2329088811.

The spelling of 127440393 in words is "one hundred twenty-seven million, four hundred forty thousand, three hundred ninety-three".