67899871 has 4 divisors (see below), whose sum is σ = 73122952. Its totient is φ = 62676792.

The previous prime is 67899859. The next prime is 67899883. The reversal of 67899871 is 17899876.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (67899859) and next prime (67899883).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67899871 is a prime.

It is a super-2 number, since 2×67899871² = 9220784963633282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67899851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2611521 + ... + 2611546.

It is an arithmetic number, because the mean of its divisors is an integer number (18280738).

Almost surely, 2^67899871 is an apocalyptic number.

67899871 is a deficient number, since it is larger than the sum of its proper divisors (5223081).

67899871 is a wasteful number, since it uses less digits than its factorization.

67899871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223080.

The product of its digits is 1524096, while the sum is 55.

The square root of 67899871 is about 8240.1378022458. The cubic root of 67899871 is about 407.9650725419.

The spelling of 67899871 in words is "sixty-seven million, eight hundred ninety-nine thousand, eight hundred seventy-one".