72990019 has 2 divisors, whose sum is σ = 72990020. Its totient is φ = 72990018.

The previous prime is 72990007. The next prime is 72990037. The reversal of 72990019 is 91009927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72990019 - 2²¹ = 70892867 is a prime.

It is a super-2 number, since 2×72990019² = 10655085747240722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72990019.

It is not a weakly prime, because it can be changed into another prime (72990119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36495009 + 36495010.

It is an arithmetic number, because the mean of its divisors is an integer number (36495010).

Almost surely, 2^72990019 is an apocalyptic number.

72990019 is a deficient number, since it is larger than the sum of its proper divisors (1).

72990019 is an equidigital number, since it uses as much as digits as its factorization.

72990019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 72990019 is about 8543.4196315059. The cubic root of 72990019 is about 417.9148712884.

The spelling of 72990019 in words is "seventy-two million, nine hundred ninety thousand, nineteen".