87929747 has 2 divisors, whose sum is σ = 87929748. Its totient is φ = 87929746.

The previous prime is 87929693. The next prime is 87929749. The reversal of 87929747 is 74792978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87929747 - 2¹⁸ = 87667603 is a prime.

Together with 87929749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87929749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43964873 + 43964874.

It is an arithmetic number, because the mean of its divisors is an integer number (43964874).

Almost surely, 2^87929747 is an apocalyptic number.

87929747 is a deficient number, since it is larger than the sum of its proper divisors (1).

87929747 is an equidigital number, since it uses as much as digits as its factorization.

87929747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 53.

The square root of 87929747 is about 9377.0862745311. The cubic root of 87929747 is about 444.6776220009.

The spelling of 87929747 in words is "eighty-seven million, nine hundred twenty-nine thousand, seven hundred forty-seven".