65243997 has 96 divisors (see below), whose sum is σ = 124750080. Its totient is φ = 31933440.

The previous prime is 65243993. The next prime is 65244001. The reversal of 65243997 is 79934256.

It is a happy number.

65243997 is a `hidden beast` number, since 6 + 524 + 39 + 97 = 666.

It is an interprime number because it is at equal distance from previous prime (65243993) and next prime (65244001).

It is not a de Polignac number, because 65243997 - 2² = 65243993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65243993) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 973758 + ... + 973824.

It is an arithmetic number, because the mean of its divisors is an integer number (1299480).

Almost surely, 2^65243997 is an apocalyptic number.

65243997 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

65243997 is a deficient number, since it is larger than the sum of its proper divisors (59506083).

65243997 is a wasteful number, since it uses less digits than its factorization.

65243997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 160 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 65243997 is about 8077.3756257834. The cubic root of 65243997 is about 402.5750476679.

The spelling of 65243997 in words is "sixty-five million, two hundred forty-three thousand, nine hundred ninety-seven".