51970439 has 2 divisors, whose sum is σ = 51970440. Its totient is φ = 51970438.

The previous prime is 51970333. The next prime is 51970447. The reversal of 51970439 is 93407915.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51970439 - 2⁸ = 51970183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51970469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25985219 + 25985220.

It is an arithmetic number, because the mean of its divisors is an integer number (25985220).

Almost surely, 2^51970439 is an apocalyptic number.

51970439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51970439 is an equidigital number, since it uses as much as digits as its factorization.

51970439 is an evil number, because the sum of its binary digits is even.

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

The square root of 51970439 is about 7209.0525729807. The cubic root of 51970439 is about 373.1803735811.

The spelling of 51970439 in words is "fifty-one million, nine hundred seventy thousand, four hundred thirty-nine".