972073538 has 4 divisors (see below), whose sum is σ = 1458110310. Its totient is φ = 486036768.

The previous prime is 972073519. The next prime is 972073559. The reversal of 972073538 is 835370279.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 908600449 + 63473089 = 30143^2 + 7967^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243018383 + ... + 243018386.

Almost surely, 2^972073538 is an apocalyptic number.

972073538 is a deficient number, since it is larger than the sum of its proper divisors (486036772).

972073538 is a wasteful number, since it uses less digits than its factorization.

972073538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486036771.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 972073538 is about 31178.0938801589. The cubic root of 972073538 is about 990.6031552242.

The spelling of 972073538 in words is "nine hundred seventy-two million, seventy-three thousand, five hundred thirty-eight".