87828731 has 2 divisors, whose sum is σ = 87828732. Its totient is φ = 87828730.

The previous prime is 87828649. The next prime is 87828751. The reversal of 87828731 is 13782878.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87828731 is a prime.

It is a super-2 number, since 2×87828731² = 15427771978140722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87828751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43914365 + 43914366.

It is an arithmetic number, because the mean of its divisors is an integer number (43914366).

Almost surely, 2^87828731 is an apocalyptic number.

87828731 is a deficient number, since it is larger than the sum of its proper divisors (1).

87828731 is an equidigital number, since it uses as much as digits as its factorization.

87828731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 44.

The square root of 87828731 is about 9371.6984053052. The cubic root of 87828731 is about 444.5072709772.

The spelling of 87828731 in words is "eighty-seven million, eight hundred twenty-eight thousand, seven hundred thirty-one".