720926401 has 4 divisors (see below), whose sum is σ = 776382292. Its totient is φ = 665470512.

The previous prime is 720926387. The next prime is 720926413. The reversal of 720926401 is 104629027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104629027 = 263 ⋅397829.

It can be written as a sum of positive squares in 2 ways, for example, as 102111025 + 618815376 = 10105^2 + 24876^2 .

It is a cyclic number.

It is not a de Polignac number, because 720926401 - 2⁷ = 720926273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720926431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27727926 + ... + 27727951.

It is an arithmetic number, because the mean of its divisors is an integer number (194095573).

Almost surely, 2^720926401 is an apocalyptic number.

It is an amenable number.

720926401 is a deficient number, since it is larger than the sum of its proper divisors (55455891).

720926401 is a wasteful number, since it uses less digits than its factorization.

720926401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55455890.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 720926401 is about 26850.0726442220. The cubic root of 720926401 is about 896.6651899172.

The spelling of 720926401 in words is "seven hundred twenty million, nine hundred twenty-six thousand, four hundred one".