487436981 has 2 divisors, whose sum is σ = 487436982. Its totient is φ = 487436980.

The previous prime is 487436933. The next prime is 487437011. The reversal of 487436981 is 189634784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399640081 + 87796900 = 19991^2 + 9370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487436981 is a prime.

It is a super-2 number, since 2×487436981² = 475189620892788722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487436921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243718490 + 243718491.

It is an arithmetic number, because the mean of its divisors is an integer number (243718491).

Almost surely, 2^487436981 is an apocalyptic number.

It is an amenable number.

487436981 is a deficient number, since it is larger than the sum of its proper divisors (1).

487436981 is an equidigital number, since it uses as much as digits as its factorization.

487436981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 487436981 is about 22077.9750203681. The cubic root of 487436981 is about 786.9965437791.

The spelling of 487436981 in words is "four hundred eighty-seven million, four hundred thirty-six thousand, nine hundred eighty-one".