67973037991 has 2 divisors, whose sum is σ = 67973037992. Its totient is φ = 67973037990.

The previous prime is 67973037967. The next prime is 67973038009. The reversal of 67973037991 is 19973037976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67973037991 - 2¹³ = 67973029799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67973037091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33986518995 + 33986518996.

It is an arithmetic number, because the mean of its divisors is an integer number (33986518996).

Almost surely, 2^67973037991 is an apocalyptic number.

67973037991 is a deficient number, since it is larger than the sum of its proper divisors (1).

67973037991 is an equidigital number, since it uses as much as digits as its factorization.

67973037991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13502538, while the sum is 61.

The spelling of 67973037991 in words is "sixty-seven billion, nine hundred seventy-three million, thirty-seven thousand, nine hundred ninety-one".