87042687497 has 2 divisors, whose sum is σ = 87042687498. Its totient is φ = 87042687496.

The previous prime is 87042687481. The next prime is 87042687541. The reversal of 87042687497 is 79478624078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65851771456 + 21190916041 = 256616^2 + 145571^2 .

It is a cyclic number.

It is not a de Polignac number, because 87042687497 - 2⁴ = 87042687481 is a prime.

It is not a weakly prime, because it can be changed into another prime (87042687467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43521343748 + 43521343749.

It is an arithmetic number, because the mean of its divisors is an integer number (43521343749).

Almost surely, 2^87042687497 is an apocalyptic number.

It is an amenable number.

87042687497 is a deficient number, since it is larger than the sum of its proper divisors (1).

87042687497 is an equidigital number, since it uses as much as digits as its factorization.

87042687497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37933056, while the sum is 62.

The spelling of 87042687497 in words is "eighty-seven billion, forty-two million, six hundred eighty-seven thousand, four hundred ninety-seven".