65031979 has 2 divisors, whose sum is σ = 65031980. Its totient is φ = 65031978.

The previous prime is 65031961. The next prime is 65031997. The reversal of 65031979 is 97913056.

Together with next prime (65031997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (65031961) and next prime (65031997).

It is a cyclic number.

It is not a de Polignac number, because 65031979 - 2⁹ = 65031467 is a prime.

It is not a weakly prime, because it can be changed into another prime (65031959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32515989 + 32515990.

It is an arithmetic number, because the mean of its divisors is an integer number (32515990).

Almost surely, 2^65031979 is an apocalyptic number.

65031979 is a deficient number, since it is larger than the sum of its proper divisors (1).

65031979 is an equidigital number, since it uses as much as digits as its factorization.

65031979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 65031979 is about 8064.2407578147. The cubic root of 65031979 is about 402.1385028889.

The spelling of 65031979 in words is "sixty-five million, thirty-one thousand, nine hundred seventy-nine".