72930551 has 2 divisors, whose sum is σ = 72930552. Its totient is φ = 72930550.

The previous prime is 72930547. The next prime is 72930553. The reversal of 72930551 is 15503927.

It is a strong prime.

It is an emirp because it is prime and its reverse (15503927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72930551 - 2² = 72930547 is a prime.

Together with 72930553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72930553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36465275 + 36465276.

It is an arithmetic number, because the mean of its divisors is an integer number (36465276).

Almost surely, 2^72930551 is an apocalyptic number.

72930551 is a deficient number, since it is larger than the sum of its proper divisors (1).

72930551 is an equidigital number, since it uses as much as digits as its factorization.

72930551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 72930551 is about 8539.9385829173. The cubic root of 72930551 is about 417.8013429164.

The spelling of 72930551 in words is "seventy-two million, nine hundred thirty thousand, five hundred fifty-one".