87939069 has 8 divisors (see below), whose sum is σ = 117479232. Its totient is φ = 58512480.

The previous prime is 87939053. The next prime is 87939077. The reversal of 87939069 is 96093978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87939069 - 2⁴ = 87939053 is a prime.

It is a super-2 number, since 2×87939069² = 15466559713173522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87939029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26569 + ... + 29694.

It is an arithmetic number, because the mean of its divisors is an integer number (14684904).

Almost surely, 2^87939069 is an apocalyptic number.

It is an amenable number.

87939069 is a deficient number, since it is larger than the sum of its proper divisors (29540163).

87939069 is a wasteful number, since it uses less digits than its factorization.

87939069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56787.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 87939069 is about 9377.5833240766. The cubic root of 87939069 is about 444.6933358272.

The spelling of 87939069 in words is "eighty-seven million, nine hundred thirty-nine thousand, sixty-nine".