65623387 has 2 divisors, whose sum is σ = 65623388. Its totient is φ = 65623386.

The previous prime is 65623343. The next prime is 65623409. The reversal of 65623387 is 78332656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65623387 is a prime.

It is not a weakly prime, because it can be changed into another prime (65624387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32811693 + 32811694.

It is an arithmetic number, because the mean of its divisors is an integer number (32811694).

Almost surely, 2^65623387 is an apocalyptic number.

65623387 is a deficient number, since it is larger than the sum of its proper divisors (1).

65623387 is an equidigital number, since it uses as much as digits as its factorization.

65623387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 65623387 is about 8100.8263158767. The cubic root of 65623387 is about 403.3538567674.

The spelling of 65623387 in words is "sixty-five million, six hundred twenty-three thousand, three hundred eighty-seven".