72016801 has 2 divisors, whose sum is σ = 72016802. Its totient is φ = 72016800.

The previous prime is 72016799. The next prime is 72016807. The reversal of 72016801 is 10861027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70576801 + 1440000 = 8401^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 72016801 - 2¹ = 72016799 is a prime.

Together with 72016799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72016807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36008400 + 36008401.

It is an arithmetic number, because the mean of its divisors is an integer number (36008401).

Almost surely, 2^72016801 is an apocalyptic number.

It is an amenable number.

72016801 is a deficient number, since it is larger than the sum of its proper divisors (1).

72016801 is an equidigital number, since it uses as much as digits as its factorization.

72016801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 72016801 is about 8486.2713249106. The cubic root of 72016801 is about 416.0491208792.

Adding to 72016801 its reverse (10861027), we get a palindrome (82877828).

The spelling of 72016801 in words is "seventy-two million, sixteen thousand, eight hundred one".