77156141 has 2 divisors, whose sum is σ = 77156142. Its totient is φ = 77156140.

The previous prime is 77156119. The next prime is 77156143. The reversal of 77156141 is 14165177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49646116 + 27510025 = 7046^2 + 5245^2 .

It is a cyclic number.

It is not a de Polignac number, because 77156141 - 2¹⁸ = 76893997 is a prime.

It is a super-3 number, since 3×77156141³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 77156143, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77156098 and 77156107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77156143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38578070 + 38578071.

It is an arithmetic number, because the mean of its divisors is an integer number (38578071).

Almost surely, 2^77156141 is an apocalyptic number.

It is an amenable number.

77156141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77156141 is an equidigital number, since it uses as much as digits as its factorization.

77156141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 32.

The square root of 77156141 is about 8783.8568408188. The cubic root of 77156141 is about 425.7194568203.

The spelling of 77156141 in words is "seventy-seven million, one hundred fifty-six thousand, one hundred forty-one".