65400739 has 2 divisors, whose sum is σ = 65400740. Its totient is φ = 65400738.

The previous prime is 65400737. The next prime is 65400749. The reversal of 65400739 is 93700456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65400739 - 2¹ = 65400737 is a prime.

It is a super-2 number, since 2×65400739² = 8554513323492242, which contains 22 as substring.

Together with 65400737, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65400737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32700369 + 32700370.

It is an arithmetic number, because the mean of its divisors is an integer number (32700370).

Almost surely, 2^65400739 is an apocalyptic number.

65400739 is a deficient number, since it is larger than the sum of its proper divisors (1).

65400739 is an equidigital number, since it uses as much as digits as its factorization.

65400739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 65400739 is about 8087.0723379972. The cubic root of 65400739 is about 402.8971715802.

The spelling of 65400739 in words is "sixty-five million, four hundred thousand, seven hundred thirty-nine".