65139330 has 16 divisors (see below), whose sum is σ = 156334464. Its totient is φ = 17370480.

The previous prime is 65139329. The next prime is 65139331. The reversal of 65139330 is 3393156.

65139330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65139329) and next prime (65139331).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2171311 = 65139330 / (6 + 5 + 1 + 3 + 9 + 3 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (65139331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085626 + ... + 1085685.

It is an arithmetic number, because the mean of its divisors is an integer number (9770904).

Almost surely, 2^65139330 is an apocalyptic number.

65139330 is an abundant number, since it is smaller than the sum of its proper divisors (91195134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65139330 is a wasteful number, since it uses less digits than its factorization.

65139330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171321.

The product of its (nonzero) digits is 7290, while the sum is 30.

The square root of 65139330 is about 8070.8940025254. The cubic root of 65139330 is about 402.3596568437.

The spelling of 65139330 in words is "sixty-five million, one hundred thirty-nine thousand, three hundred thirty".