70831249 has 4 divisors (see below), whose sum is σ = 73116160. Its totient is φ = 68546340.

The previous prime is 70831219. The next prime is 70831289. The reversal of 70831249 is 94213807.

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 70831249 - 2¹³ = 70823057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70831219) 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 in 3 ways as a sum of consecutive naturals, for example, 1142409 + ... + 1142470.

It is an arithmetic number, because the mean of its divisors is an integer number (18279040).

Almost surely, 2^70831249 is an apocalyptic number.

It is an amenable number.

70831249 is a deficient number, since it is larger than the sum of its proper divisors (2284911).

70831249 is a wasteful number, since it uses less digits than its factorization.

70831249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284910.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 70831249 is about 8416.1302865391. The cubic root of 70831249 is about 413.7534550023.

The spelling of 70831249 in words is "seventy million, eight hundred thirty-one thousand, two hundred forty-nine".