67899983 has 2 divisors, whose sum is σ = 67899984. Its totient is φ = 67899982.

The previous prime is 67899959. The next prime is 67900003. The reversal of 67899983 is 38999876.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67899983 is a prime.

It is a super-2 number, since 2×67899983² = 9220815382800578, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67899583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33949991 + 33949992.

It is an arithmetic number, because the mean of its divisors is an integer number (33949992).

Almost surely, 2^67899983 is an apocalyptic number.

67899983 is a deficient number, since it is larger than the sum of its proper divisors (1).

67899983 is an equidigital number, since it uses as much as digits as its factorization.

67899983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 67899983 is about 8240.1445982458. The cubic root of 67899983 is about 407.9652968529.

The spelling of 67899983 in words is "sixty-seven million, eight hundred ninety-nine thousand, nine hundred eighty-three".