709531216 has 10 divisors (see below), whose sum is σ = 1374716762. Its totient is φ = 354765600.

The previous prime is 709531213. The next prime is 709531217. The reversal of 709531216 is 612135907.

It can be written as a sum of positive squares in only one way, i.e., 707560000 + 1971216 = 26600^2 + 1404^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709531213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22172835 + ... + 22172866.

Almost surely, 2^709531216 is an apocalyptic number.

It is an amenable number.

709531216 is a deficient number, since it is larger than the sum of its proper divisors (665185546).

709531216 is a wasteful number, since it uses less digits than its factorization.

709531216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44345709 (or 44345703 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 709531216 is about 26637.0271614533. The cubic root of 709531216 is about 891.9157554816.

The spelling of 709531216 in words is "seven hundred nine million, five hundred thirty-one thousand, two hundred sixteen".