51910993 has 2 divisors, whose sum is σ = 51910994. Its totient is φ = 51910992.

The previous prime is 51910987. The next prime is 51911003. The reversal of 51910993 is 39901915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49112064 + 2798929 = 7008^2 + 1673^2 .

It is a cyclic number.

It is not a de Polignac number, because 51910993 - 2¹³ = 51902801 is a prime.

It is not a weakly prime, because it can be changed into another prime (51910693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25955496 + 25955497.

It is an arithmetic number, because the mean of its divisors is an integer number (25955497).

Almost surely, 2^51910993 is an apocalyptic number.

It is an amenable number.

51910993 is a deficient number, since it is larger than the sum of its proper divisors (1).

51910993 is an equidigital number, since it uses as much as digits as its factorization.

51910993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 51910993 is about 7204.9283827114. The cubic root of 51910993 is about 373.0380327641.

The spelling of 51910993 in words is "fifty-one million, nine hundred ten thousand, nine hundred ninety-three".