87206769 has 12 divisors (see below), whose sum is σ = 135655156. Its totient is φ = 53665632.

The previous prime is 87206767. The next prime is 87206771. The reversal of 87206769 is 96760278.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87206767) and next prime (87206771).

It can be written as a sum of positive squares in 2 ways, for example, as 26132544 + 61074225 = 5112^2 + 7815^2 .

It is not a de Polignac number, because 87206769 - 2¹ = 87206767 is a prime.

It is a super-2 number, since 2×87206769² = 15210041118838722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87206767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 372562 + ... + 372795.

Almost surely, 2^87206769 is an apocalyptic number.

It is an amenable number.

87206769 is a deficient number, since it is larger than the sum of its proper divisors (48448387).

87206769 is a wasteful number, since it uses less digits than its factorization.

87206769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745376 (or 745373 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 87206769 is about 9338.4564570383. The cubic root of 87206769 is about 443.4555201806.

The spelling of 87206769 in words is "eighty-seven million, two hundred six thousand, seven hundred sixty-nine".