65929987 has 2 divisors, whose sum is σ = 65929988. Its totient is φ = 65929986.

The previous prime is 65929973. The next prime is 65929993. The reversal of 65929987 is 78992956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65929987 - 2¹⁹ = 65405699 is a prime.

It is not a weakly prime, because it can be changed into another prime (65929907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32964993 + 32964994.

It is an arithmetic number, because the mean of its divisors is an integer number (32964994).

Almost surely, 2^65929987 is an apocalyptic number.

65929987 is a deficient number, since it is larger than the sum of its proper divisors (1).

65929987 is an equidigital number, since it uses as much as digits as its factorization.

65929987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 65929987 is about 8119.7282589998. The cubic root of 65929987 is about 403.9810528480.

The spelling of 65929987 in words is "sixty-five million, nine hundred twenty-nine thousand, nine hundred eighty-seven".