69142477 has 2 divisors, whose sum is σ = 69142478. Its totient is φ = 69142476.

The previous prime is 69142471. The next prime is 69142547. The reversal of 69142477 is 77424196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69122596 + 19881 = 8314^2 + 141^2 .

It is a cyclic number.

It is not a de Polignac number, because 69142477 - 2¹¹ = 69140429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69142471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34571238 + 34571239.

It is an arithmetic number, because the mean of its divisors is an integer number (34571239).

Almost surely, 2^69142477 is an apocalyptic number.

It is an amenable number.

69142477 is a deficient number, since it is larger than the sum of its proper divisors (1).

69142477 is an equidigital number, since it uses as much as digits as its factorization.

69142477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 69142477 is about 8315.1955479111. The cubic root of 69142477 is about 410.4387074847.

The spelling of 69142477 in words is "sixty-nine million, one hundred forty-two thousand, four hundred seventy-seven".