197073945 has 64 divisors (see below), whose sum is σ = 379779840. Its totient is φ = 96574464.

The previous prime is 197073941. The next prime is 197073971. The reversal of 197073945 is 549370791.

It is not a de Polignac number, because 197073945 - 2² = 197073941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 197073945.

It is not an unprimeable number, because it can be changed into a prime (197073941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97687 + ... + 99683.

It is an arithmetic number, because the mean of its divisors is an integer number (5934060).

Almost surely, 2^197073945 is an apocalyptic number.

197073945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197073945 is a deficient number, since it is larger than the sum of its proper divisors (182705895).

197073945 is a wasteful number, since it uses less digits than its factorization.

197073945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 197073945 is about 14038.3027820317. The cubic root of 197073945 is about 581.9375796591.

The spelling of 197073945 in words is "one hundred ninety-seven million, seventy-three thousand, nine hundred forty-five".