276421381 has 2 divisors, whose sum is σ = 276421382. Its totient is φ = 276421380.

The previous prime is 276421363. The next prime is 276421393. The reversal of 276421381 is 183124672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275858881 + 562500 = 16609^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 276421381 - 2¹¹ = 276419333 is a prime.

It is a super-2 number, since 2×276421381² = 152817559747894322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276421331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138210690 + 138210691.

It is an arithmetic number, because the mean of its divisors is an integer number (138210691).

Almost surely, 2^276421381 is an apocalyptic number.

It is an amenable number.

276421381 is a deficient number, since it is larger than the sum of its proper divisors (1).

276421381 is an equidigital number, since it uses as much as digits as its factorization.

276421381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 276421381 is about 16625.9249667500. The cubic root of 276421381 is about 651.4141840902.

The spelling of 276421381 in words is "two hundred seventy-six million, four hundred twenty-one thousand, three hundred eighty-one".