61008839 has 2 divisors, whose sum is σ = 61008840. Its totient is φ = 61008838.

The previous prime is 61008833. The next prime is 61008841. The reversal of 61008839 is 93880016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61008839 - 2⁸ = 61008583 is a prime.

It is a super-2 number, since 2×61008839² = 7444156872255842, which contains 22 as substring.

Together with 61008841, 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 = 61008799 and 61008808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61008833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30504419 + 30504420.

It is an arithmetic number, because the mean of its divisors is an integer number (30504420).

Almost surely, 2^61008839 is an apocalyptic number.

61008839 is a deficient number, since it is larger than the sum of its proper divisors (1).

61008839 is an equidigital number, since it uses as much as digits as its factorization.

61008839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 61008839 is about 7810.8155144005. The cubic root of 61008839 is about 393.6687308884.

The spelling of 61008839 in words is "sixty-one million, eight thousand, eight hundred thirty-nine".