9213157970 has 32 divisors (see below), whose sum is σ = 17163374256. Its totient is φ = 3558297600.

The previous prime is 9213157963. The next prime is 9213157979. The reversal of 9213157970 is 797513129.

It can be written as a sum of positive squares in 8 ways, for example, as 1127012041 + 8086145929 = 33571^2 + 89923^2 .

It is not an unprimeable number, because it can be changed into a prime (9213157979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76061 + ... + 155600.

Almost surely, 2^9213157970 is an apocalyptic number.

9213157970 is a deficient number, since it is larger than the sum of its proper divisors (7950216286).

9213157970 is a wasteful number, since it uses less digits than its factorization.

9213157970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231806.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 9213157970 is about 95985.1966190620. The cubic root of 9213157970 is about 2096.3775774208.

The spelling of 9213157970 in words is "nine billion, two hundred thirteen million, one hundred fifty-seven thousand, nine hundred seventy".