65189973 has 4 divisors (see below), whose sum is σ = 86919968. Its totient is φ = 43459980.

The previous prime is 65189963. The next prime is 65189983. The reversal of 65189973 is 37998156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (65189963) and next prime (65189983).

It is not a de Polignac number, because 65189973 - 2⁸ = 65189717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65189933) 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, 10864993 + ... + 10864998.

It is an arithmetic number, because the mean of its divisors is an integer number (21729992).

Almost surely, 2^65189973 is an apocalyptic number.

It is an amenable number.

65189973 is a deficient number, since it is larger than the sum of its proper divisors (21729995).

65189973 is a wasteful number, since it uses less digits than its factorization.

65189973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21729994.

The product of its digits is 408240, while the sum is 48.

The square root of 65189973 is about 8074.0307777466. The cubic root of 65189973 is about 402.4639022190.

The spelling of 65189973 in words is "sixty-five million, one hundred eighty-nine thousand, nine hundred seventy-three".