721206053 has 2 divisors, whose sum is σ = 721206054. Its totient is φ = 721206052.

The previous prime is 721206043. The next prime is 721206061. The reversal of 721206053 is 350602127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488277409 + 232928644 = 22097^2 + 15262^2 .

It is a cyclic number.

It is not a de Polignac number, because 721206053 - 2¹⁰ = 721205029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721206043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360603026 + 360603027.

It is an arithmetic number, because the mean of its divisors is an integer number (360603027).

Almost surely, 2^721206053 is an apocalyptic number.

It is an amenable number.

721206053 is a deficient number, since it is larger than the sum of its proper divisors (1).

721206053 is an equidigital number, since it uses as much as digits as its factorization.

721206053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 721206053 is about 26855.2797974625. The cubic root of 721206053 is about 896.7811156656.

The spelling of 721206053 in words is "seven hundred twenty-one million, two hundred six thousand, fifty-three".