721054369 has 8 divisors (see below), whose sum is σ = 828333440. Its totient is φ = 614843136.

The previous prime is 721054339. The next prime is 721054379. The reversal of 721054369 is 963450127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721054369 - 2¹⁷ = 720923297 is a prime.

It is a super-2 number, since 2×721054369² = 1039838806107976322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721054319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265509 + ... + 268210.

It is an arithmetic number, because the mean of its divisors is an integer number (103541680).

Almost surely, 2^721054369 is an apocalyptic number.

It is an amenable number.

721054369 is a deficient number, since it is larger than the sum of its proper divisors (107279071).

721054369 is a wasteful number, since it uses less digits than its factorization.

721054369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533919.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 721054369 is about 26852.4555487948. The cubic root of 721054369 is about 896.7182409464.

The spelling of 721054369 in words is "seven hundred twenty-one million, fifty-four thousand, three hundred sixty-nine".