87786379 has 2 divisors, whose sum is σ = 87786380. Its totient is φ = 87786378.

The previous prime is 87786353. The next prime is 87786409. The reversal of 87786379 is 97368778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87786379 - 2¹¹ = 87784331 is a prime.

It is not a weakly prime, because it can be changed into another prime (87786319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43893189 + 43893190.

It is an arithmetic number, because the mean of its divisors is an integer number (43893190).

Almost surely, 2^87786379 is an apocalyptic number.

87786379 is a deficient number, since it is larger than the sum of its proper divisors (1).

87786379 is an equidigital number, since it uses as much as digits as its factorization.

87786379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 55.

The square root of 87786379 is about 9369.4385637561. The cubic root of 87786379 is about 444.4358106911.

The spelling of 87786379 in words is "eighty-seven million, seven hundred eighty-six thousand, three hundred seventy-nine".