67899929 has 2 divisors, whose sum is σ = 67899930. Its totient is φ = 67899928.

The previous prime is 67899917. The next prime is 67899941. The reversal of 67899929 is 92999876.

It is a balanced prime because it is at equal distance from previous prime (67899917) and next prime (67899941).

It can be written as a sum of positive squares in only one way, i.e., 61387225 + 6512704 = 7835^2 + 2552^2 .

It is a cyclic number.

It is not a de Polignac number, because 67899929 - 2¹² = 67895833 is a prime.

It is a super-2 number, since 2×67899929² = 9220800716410082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67899959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33949964 + 33949965.

It is an arithmetic number, because the mean of its divisors is an integer number (33949965).

Almost surely, 2^67899929 is an apocalyptic number.

It is an amenable number.

67899929 is a deficient number, since it is larger than the sum of its proper divisors (1).

67899929 is an equidigital number, since it uses as much as digits as its factorization.

67899929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 59.

The square root of 67899929 is about 8240.1413216037. The cubic root of 67899929 is about 407.9651887030.

The spelling of 67899929 in words is "sixty-seven million, eight hundred ninety-nine thousand, nine hundred twenty-nine".