65623723 has 16 divisors (see below), whose sum is σ = 78420960. Its totient is φ = 54208000.

The previous prime is 65623721. The next prime is 65623763. The reversal of 65623723 is 32732656.

It is not a de Polignac number, because 65623723 - 2¹ = 65623721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65623721) 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, 628 + ... + 11473.

It is an arithmetic number, because the mean of its divisors is an integer number (4901310).

Almost surely, 2^65623723 is an apocalyptic number.

65623723 is a deficient number, since it is larger than the sum of its proper divisors (12797237).

65623723 is a wasteful number, since it uses less digits than its factorization.

65623723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12158.

The product of its digits is 45360, while the sum is 34.

The square root of 65623723 is about 8100.8470544752. The cubic root of 65623723 is about 403.3545451738.

The spelling of 65623723 in words is "sixty-five million, six hundred twenty-three thousand, seven hundred twenty-three".