87772673 has 2 divisors, whose sum is σ = 87772674. Its totient is φ = 87772672.

The previous prime is 87772591. The next prime is 87772679. The reversal of 87772673 is 37627778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55771024 + 32001649 = 7468^2 + 5657^2 .

It is a cyclic number.

It is not a de Polignac number, because 87772673 - 2¹⁸ = 87510529 is a prime.

It is not a weakly prime, because it can be changed into another prime (87772679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43886336 + 43886337.

It is an arithmetic number, because the mean of its divisors is an integer number (43886337).

Almost surely, 2^87772673 is an apocalyptic number.

It is an amenable number.

87772673 is a deficient number, since it is larger than the sum of its proper divisors (1).

87772673 is an equidigital number, since it uses as much as digits as its factorization.

87772673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488, while the sum is 47.

The square root of 87772673 is about 9368.7071146450. The cubic root of 87772673 is about 444.4126797136.

The spelling of 87772673 in words is "eighty-seven million, seven hundred seventy-two thousand, six hundred seventy-three".