86953621 has 2 divisors, whose sum is σ = 86953622. Its totient is φ = 86953620.

The previous prime is 86953597. The next prime is 86953631. The reversal of 86953621 is 12635968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49914225 + 37039396 = 7065^2 + 6086^2 .

It is a cyclic number.

It is not a de Polignac number, because 86953621 - 2²³ = 78565013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86953631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43476810 + 43476811.

It is an arithmetic number, because the mean of its divisors is an integer number (43476811).

Almost surely, 2^86953621 is an apocalyptic number.

It is an amenable number.

86953621 is a deficient number, since it is larger than the sum of its proper divisors (1).

86953621 is an equidigital number, since it uses as much as digits as its factorization.

86953621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 86953621 is about 9324.8925462978. The cubic root of 86953621 is about 443.0260096458.

The spelling of 86953621 in words is "eighty-six million, nine hundred fifty-three thousand, six hundred twenty-one".