997603145 has 32 divisors (see below), whose sum is σ = 1510548480. Its totient is φ = 614370240.

The previous prime is 997603141. The next prime is 997603169. The reversal of 997603145 is 541306799.

It is not a de Polignac number, because 997603145 - 2² = 997603141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997603096 and 997603105.

It is not an unprimeable number, because it can be changed into a prime (997603141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16346 + ... + 47564.

It is an arithmetic number, because the mean of its divisors is an integer number (47204640).

Almost surely, 2^997603145 is an apocalyptic number.

It is an amenable number.

997603145 is a deficient number, since it is larger than the sum of its proper divisors (512945335).

997603145 is a wasteful number, since it uses less digits than its factorization.

997603145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31325.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 997603145 is about 31584.8562605563. The cubic root of 997603145 is about 999.2004091582.

The spelling of 997603145 in words is "nine hundred ninety-seven million, six hundred three thousand, one hundred forty-five".