72977983 has 4 divisors (see below), whose sum is σ = 78591688. Its totient is φ = 67364280.

The previous prime is 72977951. The next prime is 72978001. The reversal of 72977983 is 38977927.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72977983 - 2⁵ = 72977951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72977983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72977383) 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, 2806833 + ... + 2806858.

It is an arithmetic number, because the mean of its divisors is an integer number (19647922).

Almost surely, 2^72977983 is an apocalyptic number.

72977983 is a deficient number, since it is larger than the sum of its proper divisors (5613705).

72977983 is a wasteful number, since it uses less digits than its factorization.

72977983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613704.

The product of its digits is 1333584, while the sum is 52.

The square root of 72977983 is about 8542.7152006841. The cubic root of 72977983 is about 417.8918987416.

The spelling of 72977983 in words is "seventy-two million, nine hundred seventy-seven thousand, nine hundred eighty-three".