997070906 has 8 divisors (see below), whose sum is σ = 1610653044. Its totient is φ = 460186560.

The previous prime is 997070897. The next prime is 997070909. The reversal of 997070906 is 609070799.

It can be written as a sum of positive squares in 2 ways, for example, as 745563025 + 251507881 = 27305^2 + 15859^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (997070909) 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, 19174415 + ... + 19174466.

Almost surely, 2^997070906 is an apocalyptic number.

997070906 is a deficient number, since it is larger than the sum of its proper divisors (613582138).

997070906 is a wasteful number, since it uses less digits than its factorization.

997070906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38348896.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 997070906 is about 31576.4295955068. The cubic root of 997070906 is about 999.0226804911.

The spelling of 997070906 in words is "nine hundred ninety-seven million, seventy thousand, nine hundred six".