80611939 has 2 divisors, whose sum is σ = 80611940. Its totient is φ = 80611938.

The previous prime is 80611901. The next prime is 80611961. The reversal of 80611939 is 93911608.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80611939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80611898 and 80611907.

It is not a weakly prime, because it can be changed into another prime (80611639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40305969 + 40305970.

It is an arithmetic number, because the mean of its divisors is an integer number (40305970).

Almost surely, 2^80611939 is an apocalyptic number.

80611939 is a deficient number, since it is larger than the sum of its proper divisors (1).

80611939 is an equidigital number, since it uses as much as digits as its factorization.

80611939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 80611939 is about 8978.4151719555. The cubic root of 80611939 is about 431.9828007413.

It can be divided in two parts, 8061 and 1939, that added together give a 4-th power (10000 = 10⁴).

The spelling of 80611939 in words is "eighty million, six hundred eleven thousand, nine hundred thirty-nine".