65101989 has 16 divisors (see below), whose sum is σ = 88099200. Its totient is φ = 42758400.

The previous prime is 65101979. The next prime is 65101991. The reversal of 65101989 is 98910156.

It is not a de Polignac number, because 65101989 - 2¹¹ = 65099941 is a prime.

It is a super-2 number, since 2×65101989² = 8476537943512242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65101919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61537 + ... + 62585.

It is an arithmetic number, because the mean of its divisors is an integer number (5506200).

Almost surely, 2^65101989 is an apocalyptic number.

It is an amenable number.

65101989 is a deficient number, since it is larger than the sum of its proper divisors (22997211).

65101989 is a wasteful number, since it uses less digits than its factorization.

65101989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 65101989 is about 8068.5803584026. The cubic root of 65101989 is about 402.2827581724.

The spelling of 65101989 in words is "sixty-five million, one hundred one thousand, nine hundred eighty-nine".