427135993 has 2 divisors, whose sum is σ = 427135994. Its totient is φ = 427135992.

The previous prime is 427135981. The next prime is 427136051. The reversal of 427135993 is 399531724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421604089 + 5531904 = 20533^2 + 2352^2 .

It is a cyclic number.

It is not a de Polignac number, because 427135993 - 2¹³ = 427127801 is a prime.

It is not a weakly prime, because it can be changed into another prime (427135963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213567996 + 213567997.

It is an arithmetic number, because the mean of its divisors is an integer number (213567997).

Almost surely, 2^427135993 is an apocalyptic number.

It is an amenable number.

427135993 is a deficient number, since it is larger than the sum of its proper divisors (1).

427135993 is an equidigital number, since it uses as much as digits as its factorization.

427135993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 427135993 is about 20667.2686390824. The cubic root of 427135993 is about 753.1047550741.

The spelling of 427135993 in words is "four hundred twenty-seven million, one hundred thirty-five thousand, nine hundred ninety-three".