487779731 has 2 divisors, whose sum is σ = 487779732. Its totient is φ = 487779730.

The previous prime is 487779709. The next prime is 487779749. The reversal of 487779731 is 137977784.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487779731 is a prime.

It is a super-2 number, since 2×487779731² = 475858131948864722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (487779701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243889865 + 243889866.

It is an arithmetic number, because the mean of its divisors is an integer number (243889866).

Almost surely, 2^487779731 is an apocalyptic number.

487779731 is a deficient number, since it is larger than the sum of its proper divisors (1).

487779731 is an equidigital number, since it uses as much as digits as its factorization.

487779731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2074464, while the sum is 53.

The square root of 487779731 is about 22085.7359171027. The cubic root of 487779731 is about 787.1809641081.

The spelling of 487779731 in words is "four hundred eighty-seven million, seven hundred seventy-nine thousand, seven hundred thirty-one".