51908093 has 4 divisors (see below), whose sum is σ = 52491420. Its totient is φ = 51324768.

The previous prime is 51908081. The next prime is 51908111. The reversal of 51908093 is 39080915.

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 18983449 + 32924644 = 4357^2 + 5738^2 .

It is a cyclic number.

It is not a de Polignac number, because 51908093 - 2²⁴ = 35130877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51908053) 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, 291530 + ... + 291707.

It is an arithmetic number, because the mean of its divisors is an integer number (13122855).

Almost surely, 2^51908093 is an apocalyptic number.

It is an amenable number.

51908093 is a deficient number, since it is larger than the sum of its proper divisors (583327).

51908093 is an equidigital number, since it uses as much as digits as its factorization.

51908093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583326.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 51908093 is about 7204.7271287676. The cubic root of 51908093 is about 373.0310860631.

The spelling of 51908093 in words is "fifty-one million, nine hundred eight thousand, ninety-three".