71030137 has 4 divisors (see below), whose sum is σ = 71200080. Its totient is φ = 70860196.

The previous prime is 71030119. The next prime is 71030143. The reversal of 71030137 is 73103017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73103017 = 13 ⋅5623309.

It is a cyclic number.

It is not a de Polignac number, because 71030137 - 2⁷ = 71030009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71030147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84343 + ... + 85180.

It is an arithmetic number, because the mean of its divisors is an integer number (17800020).

Almost surely, 2^71030137 is an apocalyptic number.

It is an amenable number.

71030137 is a deficient number, since it is larger than the sum of its proper divisors (169943).

71030137 is a wasteful number, since it uses less digits than its factorization.

71030137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169942.

The product of its (nonzero) digits is 441, while the sum is 22.

The square root of 71030137 is about 8427.9378853905. The cubic root of 71030137 is about 414.1403543658.

The spelling of 71030137 in words is "seventy-one million, thirty thousand, one hundred thirty-seven".