71418157 has 2 divisors, whose sum is σ = 71418158. Its totient is φ = 71418156.

The previous prime is 71418121. The next prime is 71418161. The reversal of 71418157 is 75181417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60000516 + 11417641 = 7746^2 + 3379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71418157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71418167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35709078 + 35709079.

It is an arithmetic number, because the mean of its divisors is an integer number (35709079).

Almost surely, 2^71418157 is an apocalyptic number.

It is an amenable number.

71418157 is a deficient number, since it is larger than the sum of its proper divisors (1).

71418157 is an equidigital number, since it uses as much as digits as its factorization.

71418157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 34.

The square root of 71418157 is about 8450.9263989222. The cubic root of 71418157 is about 414.8931006416.

The spelling of 71418157 in words is "seventy-one million, four hundred eighteen thousand, one hundred fifty-seven".