87742751 has 2 divisors, whose sum is σ = 87742752. Its totient is φ = 87742750.

The previous prime is 87742691. The next prime is 87742789. The reversal of 87742751 is 15724778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87742751 - 2¹⁴ = 87726367 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87742699 and 87742708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87742051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43871375 + 43871376.

It is an arithmetic number, because the mean of its divisors is an integer number (43871376).

Almost surely, 2^87742751 is an apocalyptic number.

87742751 is a deficient number, since it is larger than the sum of its proper divisors (1).

87742751 is an equidigital number, since it uses as much as digits as its factorization.

87742751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109760, while the sum is 41.

The square root of 87742751 is about 9367.1100666107. The cubic root of 87742751 is about 444.3621733805.

The spelling of 87742751 in words is "eighty-seven million, seven hundred forty-two thousand, seven hundred fifty-one".