87626261 has 2 divisors, whose sum is σ = 87626262. Its totient is φ = 87626260.

The previous prime is 87626239. The next prime is 87626281. The reversal of 87626261 is 16262678.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77545636 + 10080625 = 8806^2 + 3175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87626261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87626221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43813130 + 43813131.

It is an arithmetic number, because the mean of its divisors is an integer number (43813131).

Almost surely, 2^87626261 is an apocalyptic number.

It is an amenable number.

87626261 is a deficient number, since it is larger than the sum of its proper divisors (1).

87626261 is an equidigital number, since it uses as much as digits as its factorization.

87626261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 87626261 is about 9360.8899683737. The cubic root of 87626261 is about 444.1654366184.

The spelling of 87626261 in words is "eighty-seven million, six hundred twenty-six thousand, two hundred sixty-one".