87939001 has 2 divisors, whose sum is σ = 87939002. Its totient is φ = 87939000.

The previous prime is 87938993. The next prime is 87939013. The reversal of 87939001 is 10093978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62173225 + 25765776 = 7885^2 + 5076^2 .

It is a cyclic number.

It is not a de Polignac number, because 87939001 - 2³ = 87938993 is a prime.

It is not a weakly prime, because it can be changed into another prime (87939091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43969500 + 43969501.

It is an arithmetic number, because the mean of its divisors is an integer number (43969501).

Almost surely, 2^87939001 is an apocalyptic number.

It is an amenable number.

87939001 is a deficient number, since it is larger than the sum of its proper divisors (1).

87939001 is an equidigital number, since it uses as much as digits as its factorization.

87939001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 87939001 is about 9377.5796984083. The cubic root of 87939001 is about 444.6932212056.

The spelling of 87939001 in words is "eighty-seven million, nine hundred thirty-nine thousand, one".