65807949 has 4 divisors (see below), whose sum is σ = 87743936. Its totient is φ = 43871964.

The previous prime is 65807939. The next prime is 65807953. The reversal of 65807949 is 94970856.

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 not a de Polignac number, because 65807949 - 2¹² = 65803853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65807898 and 65807907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65807909) 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, 10967989 + ... + 10967994.

It is an arithmetic number, because the mean of its divisors is an integer number (21935984).

Almost surely, 2^65807949 is an apocalyptic number.

It is an amenable number.

65807949 is a deficient number, since it is larger than the sum of its proper divisors (21935987).

65807949 is a wasteful number, since it uses less digits than its factorization.

65807949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21935986.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 65807949 is about 8112.2098715455. The cubic root of 65807949 is about 403.7316393290.

The spelling of 65807949 in words is "sixty-five million, eight hundred seven thousand, nine hundred forty-nine".