51486739 has 2 divisors, whose sum is σ = 51486740. Its totient is φ = 51486738.

The previous prime is 51486671. The next prime is 51486779. The reversal of 51486739 is 93768415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51486739 - 2¹⁵ = 51453971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51486695 and 51486704.

It is not a weakly prime, because it can be changed into another prime (51486779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25743369 + 25743370.

It is an arithmetic number, because the mean of its divisors is an integer number (25743370).

Almost surely, 2^51486739 is an apocalyptic number.

51486739 is a deficient number, since it is larger than the sum of its proper divisors (1).

51486739 is an equidigital number, since it uses as much as digits as its factorization.

51486739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 51486739 is about 7175.4260500684. The cubic root of 51486739 is about 372.0190065249.

It can be divided in two parts, 51486 and 739, that added together give a palindrome (52225).

The spelling of 51486739 in words is "fifty-one million, four hundred eighty-six thousand, seven hundred thirty-nine".