61906939 has 2 divisors, whose sum is σ = 61906940. Its totient is φ = 61906938.

The previous prime is 61906927. The next prime is 61906951. The reversal of 61906939 is 93960916.

It is a balanced prime because it is at equal distance from previous prime (61906927) and next prime (61906951).

It is a cyclic number.

It is not a de Polignac number, because 61906939 - 2¹³ = 61898747 is a prime.

It is equal to p_3668398 and since 61906939 and 3668398 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 61906895 and 61906904.

It is not a weakly prime, because it can be changed into another prime (61906139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30953469 + 30953470.

It is an arithmetic number, because the mean of its divisors is an integer number (30953470).

Almost surely, 2^61906939 is an apocalyptic number.

61906939 is a deficient number, since it is larger than the sum of its proper divisors (1).

61906939 is an equidigital number, since it uses as much as digits as its factorization.

61906939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 61906939 is about 7868.0962754659. The cubic root of 61906939 is about 395.5910374259.

The spelling of 61906939 in words is "sixty-one million, nine hundred six thousand, nine hundred thirty-nine".