61263539 has 2 divisors, whose sum is σ = 61263540. Its totient is φ = 61263538.

The previous prime is 61263511. The next prime is 61263541. The reversal of 61263539 is 93536216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61263539 - 2¹⁶ = 61198003 is a prime.

Together with 61263541, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61263499 and 61263508.

It is not a weakly prime, because it can be changed into another prime (61263589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30631769 + 30631770.

It is an arithmetic number, because the mean of its divisors is an integer number (30631770).

Almost surely, 2^61263539 is an apocalyptic number.

61263539 is a deficient number, since it is larger than the sum of its proper divisors (1).

61263539 is an equidigital number, since it uses as much as digits as its factorization.

61263539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 35.

The square root of 61263539 is about 7827.1028484363. The cubic root of 61263539 is about 394.2158003394.

The spelling of 61263539 in words is "sixty-one million, two hundred sixty-three thousand, five hundred thirty-nine".