87493751 has 2 divisors, whose sum is σ = 87493752. Its totient is φ = 87493750.

The previous prime is 87493697. The next prime is 87493787. The reversal of 87493751 is 15739478.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87493751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87493051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43746875 + 43746876.

It is an arithmetic number, because the mean of its divisors is an integer number (43746876).

Almost surely, 2^87493751 is an apocalyptic number.

87493751 is a deficient number, since it is larger than the sum of its proper divisors (1).

87493751 is an equidigital number, since it uses as much as digits as its factorization.

87493751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 87493751 is about 9353.8094378708. The cubic root of 87493751 is about 443.9414320252.

The spelling of 87493751 in words is "eighty-seven million, four hundred ninety-three thousand, seven hundred fifty-one".