706478249 has 4 divisors (see below), whose sum is σ = 710177280. Its totient is φ = 702779220.

The previous prime is 706478243. The next prime is 706478263. The reversal of 706478249 is 942874607.

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: 942874607 = 21059 ⋅44773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-706478249 is a prime.

It is a super-2 number, since 2×706478249² = 998223032620212002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (706478243) 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, 1849229 + ... + 1849610.

It is an arithmetic number, because the mean of its divisors is an integer number (177544320).

Almost surely, 2^706478249 is an apocalyptic number.

It is an amenable number.

706478249 is a deficient number, since it is larger than the sum of its proper divisors (3699031).

706478249 is a wasteful number, since it uses less digits than its factorization.

706478249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699030.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 706478249 is about 26579.6585568739. The cubic root of 706478249 is about 890.6346729127.

The spelling of 706478249 in words is "seven hundred six million, four hundred seventy-eight thousand, two hundred forty-nine".