427472389 has 2 divisors, whose sum is σ = 427472390. Its totient is φ = 427472388.

The previous prime is 427472363. The next prime is 427472449. The reversal of 427472389 is 983274724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382515364 + 44957025 = 19558^2 + 6705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427472389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427472329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213736194 + 213736195.

It is an arithmetic number, because the mean of its divisors is an integer number (213736195).

Almost surely, 2^427472389 is an apocalyptic number.

It is an amenable number.

427472389 is a deficient number, since it is larger than the sum of its proper divisors (1).

427472389 is an equidigital number, since it uses as much as digits as its factorization.

427472389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 427472389 is about 20675.4054131957. The cubic root of 427472389 is about 753.3024087122.

The spelling of 427472389 in words is "four hundred twenty-seven million, four hundred seventy-two thousand, three hundred eighty-nine".