61902839 has 2 divisors, whose sum is σ = 61902840. Its totient is φ = 61902838.

The previous prime is 61902829. The next prime is 61902847. The reversal of 61902839 is 93820916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61902839 - 2²⁰ = 60854263 is a prime.

It is a super-2 number, since 2×61902839² = 7663922952519842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61902829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30951419 + 30951420.

It is an arithmetic number, because the mean of its divisors is an integer number (30951420).

Almost surely, 2^61902839 is an apocalyptic number.

61902839 is a deficient number, since it is larger than the sum of its proper divisors (1).

61902839 is an equidigital number, since it uses as much as digits as its factorization.

61902839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 61902839 is about 7867.8357252805. The cubic root of 61902839 is about 395.5823041073.

The spelling of 61902839 in words is "sixty-one million, nine hundred two thousand, eight hundred thirty-nine".