61820039 has 2 divisors, whose sum is σ = 61820040. Its totient is φ = 61820038.

The previous prime is 61819997. The next prime is 61820047. The reversal of 61820039 is 93002816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61820039 - 2²⁰ = 60771463 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61819993 and 61820020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61820069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30910019 + 30910020.

It is an arithmetic number, because the mean of its divisors is an integer number (30910020).

Almost surely, 2^61820039 is an apocalyptic number.

61820039 is a deficient number, since it is larger than the sum of its proper divisors (1).

61820039 is an equidigital number, since it uses as much as digits as its factorization.

61820039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 61820039 is about 7862.5720346462. The cubic root of 61820039 is about 395.4058510832.

The spelling of 61820039 in words is "sixty-one million, eight hundred twenty thousand, thirty-nine".