86470621 has 2 divisors, whose sum is σ = 86470622. Its totient is φ = 86470620.

The previous prime is 86470609. The next prime is 86470627. The reversal of 86470621 is 12607468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84382596 + 2088025 = 9186^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 86470621 - 2¹³ = 86462429 is a prime.

It is a super-2 number, since 2×86470621² = 14954336592251282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86470627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43235310 + 43235311.

It is an arithmetic number, because the mean of its divisors is an integer number (43235311).

Almost surely, 2^86470621 is an apocalyptic number.

It is an amenable number.

86470621 is a deficient number, since it is larger than the sum of its proper divisors (1).

86470621 is an equidigital number, since it uses as much as digits as its factorization.

86470621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 86470621 is about 9298.9580599119. The cubic root of 86470621 is about 442.2041961032.

The spelling of 86470621 in words is "eighty-six million, four hundred seventy thousand, six hundred twenty-one".