67920077 has 2 divisors, whose sum is σ = 67920078. Its totient is φ = 67920076.

The previous prime is 67920053. The next prime is 67920089. The reversal of 67920077 is 77002976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59428681 + 8491396 = 7709^2 + 2914^2 .

It is a cyclic number.

It is not a de Polignac number, because 67920077 - 2¹⁶ = 67854541 is a prime.

It is a super-2 number, since 2×67920077² = 9226273719371858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67920077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67920007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33960038 + 33960039.

It is an arithmetic number, because the mean of its divisors is an integer number (33960039).

Almost surely, 2^67920077 is an apocalyptic number.

It is an amenable number.

67920077 is a deficient number, since it is larger than the sum of its proper divisors (1).

67920077 is an equidigital number, since it uses as much as digits as its factorization.

67920077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 67920077 is about 8241.3637827728. The cubic root of 67920077 is about 408.0055366575.

The spelling of 67920077 in words is "sixty-seven million, nine hundred twenty thousand, seventy-seven".