61323817 has 4 divisors (see below), whose sum is σ = 61363540. Its totient is φ = 61284096.

The previous prime is 61323799. The next prime is 61323841. The reversal of 61323817 is 71832316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50637456 + 10686361 = 7116^2 + 3269^2 .

It is a cyclic number.

It is not a de Polignac number, because 61323817 - 2¹¹ = 61321769 is a prime.

It is a super-4 number, since 4×61323817⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61323217) 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, 17448 + ... + 20665.

It is an arithmetic number, because the mean of its divisors is an integer number (15340885).

Almost surely, 2^61323817 is an apocalyptic number.

It is an amenable number.

61323817 is a deficient number, since it is larger than the sum of its proper divisors (39723).

61323817 is a wasteful number, since it uses less digits than its factorization.

61323817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39722.

The product of its digits is 6048, while the sum is 31.

The square root of 61323817 is about 7830.9524963442. The cubic root of 61323817 is about 394.3450493252.

The spelling of 61323817 in words is "sixty-one million, three hundred twenty-three thousand, eight hundred seventeen".