87938047 has 2 divisors, whose sum is σ = 87938048. Its totient is φ = 87938046.

The previous prime is 87938033. The next prime is 87938083. The reversal of 87938047 is 74083978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87938047 - 2¹¹ = 87935999 is a prime.

It is a super-2 number, since 2×87938047² = 15466200220348418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87937988 and 87938006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87938017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43969023 + 43969024.

It is an arithmetic number, because the mean of its divisors is an integer number (43969024).

Almost surely, 2^87938047 is an apocalyptic number.

87938047 is the 5013-rd centered heptagonal number.

87938047 is a deficient number, since it is larger than the sum of its proper divisors (1).

87938047 is an equidigital number, since it uses as much as digits as its factorization.

87938047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 87938047 is about 9377.5288322671. The cubic root of 87938047 is about 444.6916131255.

The spelling of 87938047 in words is "eighty-seven million, nine hundred thirty-eight thousand, forty-seven".