67920131 has 2 divisors, whose sum is σ = 67920132. Its totient is φ = 67920130.

The previous prime is 67920121. The next prime is 67920133. The reversal of 67920131 is 13102976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67920131 - 2¹⁸ = 67657987 is a prime.

It is a super-2 number, since 2×67920131² = 9226288390114322, which contains 22 as substring.

Together with 67920133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 67920094 and 67920103.

It is not a weakly prime, because it can be changed into another prime (67920133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33960065 + 33960066.

It is an arithmetic number, because the mean of its divisors is an integer number (33960066).

Almost surely, 2^67920131 is an apocalyptic number.

67920131 is a deficient number, since it is larger than the sum of its proper divisors (1).

67920131 is an equidigital number, since it uses as much as digits as its factorization.

67920131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 67920131 is about 8241.3670589290. The cubic root of 67920131 is about 408.0056447861.

The spelling of 67920131 in words is "sixty-seven million, nine hundred twenty thousand, one hundred thirty-one".