70312489 has 4 divisors (see below), whose sum is σ = 75721156. Its totient is φ = 64903824.

The previous prime is 70312481. The next prime is 70312513. The reversal of 70312489 is 98421307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98421307 = 1193 ⋅82499.

It can be written as a sum of positive squares in 2 ways, for example, as 22467600 + 47844889 = 4740^2 + 6917^2 .

It is a cyclic number.

It is not a de Polignac number, because 70312489 - 2³ = 70312481 is a prime.

It is a super-2 number, since 2×70312489² = 9887692218750242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70312481) 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, 2704314 + ... + 2704339.

It is an arithmetic number, because the mean of its divisors is an integer number (18930289).

Almost surely, 2^70312489 is an apocalyptic number.

It is an amenable number.

70312489 is a deficient number, since it is larger than the sum of its proper divisors (5408667).

70312489 is a wasteful number, since it uses less digits than its factorization.

70312489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5408666.

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

The square root of 70312489 is about 8385.2542597109. The cubic root of 70312489 is about 412.7408845882.

The spelling of 70312489 in words is "seventy million, three hundred twelve thousand, four hundred eighty-nine".