72610997 has 4 divisors (see below), whose sum is σ = 72788940. Its totient is φ = 72433056.

The previous prime is 72610963. The next prime is 72611009. The reversal of 72610997 is 79901627.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67256401 + 5354596 = 8201^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 72610997 - 2¹² = 72606901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72610957) 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, 88358 + ... + 89175.

It is an arithmetic number, because the mean of its divisors is an integer number (18197235).

Almost surely, 2^72610997 is an apocalyptic number.

It is an amenable number.

72610997 is a deficient number, since it is larger than the sum of its proper divisors (177943).

72610997 is a wasteful number, since it uses less digits than its factorization.

72610997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177942.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 72610997 is about 8521.2086584005. The cubic root of 72610997 is about 417.1902338480.

The spelling of 72610997 in words is "seventy-two million, six hundred ten thousand, nine hundred ninety-seven".