127693381 has 2 divisors, whose sum is σ = 127693382. Its totient is φ = 127693380.

The previous prime is 127693343. The next prime is 127693387. The reversal of 127693381 is 183396721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88830625 + 38862756 = 9425^2 + 6234^2 .

It is a cyclic number.

It is not a de Polignac number, because 127693381 - 2⁹ = 127692869 is a prime.

It is a super-2 number, since 2×127693381² = 32611199102422322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127693387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63846690 + 63846691.

It is an arithmetic number, because the mean of its divisors is an integer number (63846691).

Almost surely, 2^127693381 is an apocalyptic number.

It is an amenable number.

127693381 is a deficient number, since it is larger than the sum of its proper divisors (1).

127693381 is an equidigital number, since it uses as much as digits as its factorization.

127693381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 127693381 is about 11300.1496007796. The cubic root of 127693381 is about 503.5656859875.

The spelling of 127693381 in words is "one hundred twenty-seven million, six hundred ninety-three thousand, three hundred eighty-one".