86961629 has 2 divisors, whose sum is σ = 86961630. Its totient is φ = 86961628.

The previous prime is 86961619. The next prime is 86961649. The reversal of 86961629 is 92616968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45873529 + 41088100 = 6773^2 + 6410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86961629 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86961619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43480814 + 43480815.

It is an arithmetic number, because the mean of its divisors is an integer number (43480815).

Almost surely, 2^86961629 is an apocalyptic number.

It is an amenable number.

86961629 is a deficient number, since it is larger than the sum of its proper divisors (1).

86961629 is an equidigital number, since it uses as much as digits as its factorization.

86961629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 86961629 is about 9325.3219247380. The cubic root of 86961629 is about 443.0396093991.

The spelling of 86961629 in words is "eighty-six million, nine hundred sixty-one thousand, six hundred twenty-nine".