65453989 has 4 divisors (see below), whose sum is σ = 67565440. Its totient is φ = 63342540.

The previous prime is 65453987. The next prime is 65454001. The reversal of 65453989 is 98935456.

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 a cyclic number.

It is not a de Polignac number, because 65453989 - 2¹ = 65453987 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 (65453987) 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, 1055679 + ... + 1055740.

It is an arithmetic number, because the mean of its divisors is an integer number (16891360).

Almost surely, 2^65453989 is an apocalyptic number.

It is an amenable number.

65453989 is a deficient number, since it is larger than the sum of its proper divisors (2111451).

65453989 is a wasteful number, since it uses less digits than its factorization.

65453989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111450.

The product of its digits is 1166400, while the sum is 49.

The square root of 65453989 is about 8090.3639596745. The cubic root of 65453989 is about 403.0064896836.

The spelling of 65453989 in words is "sixty-five million, four hundred fifty-three thousand, nine hundred eighty-nine".