71903057 has 2 divisors, whose sum is σ = 71903058. Its totient is φ = 71903056.

The previous prime is 71903021. The next prime is 71903059. The reversal of 71903057 is 75030917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42915601 + 28987456 = 6551^2 + 5384^2 .

It is a cyclic number.

It is not a de Polignac number, because 71903057 - 2¹² = 71898961 is a prime.

It is a super-3 number, since 3×71903057³ (a number of 25 digits) contains 333 as substring.

Together with 71903059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71903059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35951528 + 35951529.

It is an arithmetic number, because the mean of its divisors is an integer number (35951529).

Almost surely, 2^71903057 is an apocalyptic number.

It is an amenable number.

71903057 is a deficient number, since it is larger than the sum of its proper divisors (1).

71903057 is an equidigital number, since it uses as much as digits as its factorization.

71903057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 71903057 is about 8479.5670290410. The cubic root of 71903057 is about 415.8299681880.

The spelling of 71903057 in words is "seventy-one million, nine hundred three thousand, fifty-seven".