51740993 has 4 divisors (see below), whose sum is σ = 52589268. Its totient is φ = 50892720.

The previous prime is 51740981. The next prime is 51740999. The reversal of 51740993 is 39904715.

It is a happy number.

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 1373584 + 50367409 = 1172^2 + 7097^2 .

It is a cyclic number.

It is not a de Polignac number, because 51740993 - 2⁴ = 51740977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51740999) 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, 424046 + ... + 424167.

It is an arithmetic number, because the mean of its divisors is an integer number (13147317).

Almost surely, 2^51740993 is an apocalyptic number.

It is an amenable number.

51740993 is a deficient number, since it is larger than the sum of its proper divisors (848275).

51740993 is an equidigital number, since it uses as much as digits as its factorization.

51740993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848274.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 51740993 is about 7193.1212279510. The cubic root of 51740993 is about 372.6303746150.

The spelling of 51740993 in words is "fifty-one million, seven hundred forty thousand, nine hundred ninety-three".