65357139 has 4 divisors (see below), whose sum is σ = 87142856. Its totient is φ = 43571424.

The previous prime is 65357113. The next prime is 65357141. The reversal of 65357139 is 93175356.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65357139 - 2⁵ = 65357107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65357097 and 65357106.

It is not an unprimeable number, because it can be changed into a prime (65357189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10892854 + ... + 10892859.

It is an arithmetic number, because the mean of its divisors is an integer number (21785714).

Almost surely, 2^65357139 is an apocalyptic number.

65357139 is a deficient number, since it is larger than the sum of its proper divisors (21785717).

65357139 is a wasteful number, since it uses less digits than its factorization.

65357139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21785716.

The product of its digits is 85050, while the sum is 39.

The square root of 65357139 is about 8084.3762282566. The cubic root of 65357139 is about 402.8076199840.

The spelling of 65357139 in words is "sixty-five million, three hundred fifty-seven thousand, one hundred thirty-nine".