53217739 has 2 divisors, whose sum is σ = 53217740. Its totient is φ = 53217738.

The previous prime is 53217737. The next prime is 53217751. The reversal of 53217739 is 93771235.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53217739 - 2¹ = 53217737 is a prime.

Together with 53217737, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 53217698 and 53217707.

It is not a weakly prime, because it can be changed into another prime (53217733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26608869 + 26608870.

It is an arithmetic number, because the mean of its divisors is an integer number (26608870).

Almost surely, 2^53217739 is an apocalyptic number.

53217739 is a deficient number, since it is larger than the sum of its proper divisors (1).

53217739 is an equidigital number, since it uses as much as digits as its factorization.

53217739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 37.

The square root of 53217739 is about 7295.0489374644. The cubic root of 53217739 is about 376.1422687631.

It can be divided in two parts, 53217 and 739, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 53217739 in words is "fifty-three million, two hundred seventeen thousand, seven hundred thirty-nine".