427621477 has 2 divisors, whose sum is σ = 427621478. Its totient is φ = 427621476.

The previous prime is 427621459. The next prime is 427621489. The reversal of 427621477 is 774126724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393585921 + 34035556 = 19839^2 + 5834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427621477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427621457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213810738 + 213810739.

It is an arithmetic number, because the mean of its divisors is an integer number (213810739).

Almost surely, 2^427621477 is an apocalyptic number.

It is an amenable number.

427621477 is a deficient number, since it is larger than the sum of its proper divisors (1).

427621477 is an equidigital number, since it uses as much as digits as its factorization.

427621477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 40.

The square root of 427621477 is about 20679.0105420932. The cubic root of 427621477 is about 753.3899740524.

The spelling of 427621477 in words is "four hundred twenty-seven million, six hundred twenty-one thousand, four hundred seventy-seven".