69481861 has 2 divisors, whose sum is σ = 69481862. Its totient is φ = 69481860.

The previous prime is 69481831. The next prime is 69481889. The reversal of 69481861 is 16818496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53728900 + 15752961 = 7330^2 + 3969^2 .

It is a cyclic number.

It is not a de Polignac number, because 69481861 - 2⁷ = 69481733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69481801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34740930 + 34740931.

It is an arithmetic number, because the mean of its divisors is an integer number (34740931).

Almost surely, 2^69481861 is an apocalyptic number.

It is an amenable number.

69481861 is a deficient number, since it is larger than the sum of its proper divisors (1).

69481861 is an equidigital number, since it uses as much as digits as its factorization.

69481861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 69481861 is about 8335.5780243484. The cubic root of 69481861 is about 411.1091541962.

The spelling of 69481861 in words is "sixty-nine million, four hundred eighty-one thousand, eight hundred sixty-one".