70871237 has 4 divisors (see below), whose sum is σ = 70911456. Its totient is φ = 70831020.

The previous prime is 70871219. The next prime is 70871261. The reversal of 70871237 is 73217807.

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.

It is a cyclic number.

It is not a de Polignac number, because 70871237 - 2¹⁰ = 70870213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70871197 and 70871206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70871287) 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, 17339 + ... + 21032.

It is an arithmetic number, because the mean of its divisors is an integer number (17727864).

Almost surely, 2^70871237 is an apocalyptic number.

It is an amenable number.

70871237 is a deficient number, since it is larger than the sum of its proper divisors (40219).

70871237 is a wasteful number, since it uses less digits than its factorization.

70871237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40218.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 70871237 is about 8418.5056274852. The cubic root of 70871237 is about 413.8313022840.

The spelling of 70871237 in words is "seventy million, eight hundred seventy-one thousand, two hundred thirty-seven".