727920451 has 2 divisors, whose sum is σ = 727920452. Its totient is φ = 727920450.

The previous prime is 727920407. The next prime is 727920461. The reversal of 727920451 is 154029727.

It is a strong prime.

It is an emirp because it is prime and its reverse (154029727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 727920451 - 2¹⁵ = 727887683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 727920451.

It is not a weakly prime, because it can be changed into another prime (727920461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363960225 + 363960226.

It is an arithmetic number, because the mean of its divisors is an integer number (363960226).

Almost surely, 2^727920451 is an apocalyptic number.

727920451 is a deficient number, since it is larger than the sum of its proper divisors (1).

727920451 is an equidigital number, since it uses as much as digits as its factorization.

727920451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 727920451 is about 26980.0009451445. Note that the first 3 decimals coincide. The cubic root of 727920451 is about 899.5555216762. Note that the first 4 decimals are identical.

It can be divided in two parts, 7279 and 20451, that added together give a triangular number (27730 = T₂₃₅).

The spelling of 727920451 in words is "seven hundred twenty-seven million, nine hundred twenty thousand, four hundred fifty-one".