721929054 has 192 divisors, whose sum is σ = 1996185600. Its totient is φ = 171460800.

The previous prime is 721929053. The next prime is 721929067. The reversal of 721929054 is 450929127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721929053) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1904637 + ... + 1905015.

It is an arithmetic number, because the mean of its divisors is an integer number (10396800).

Almost surely, 2^721929054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721929054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998092800).

721929054 is an abundant number, since it is smaller than the sum of its proper divisors (1274256546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721929054 is a wasteful number, since it uses less digits than its factorization.

721929054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 721929054 is about 26868.7374842958. The cubic root of 721929054 is about 897.0806865944.

The spelling of 721929054 in words is "seven hundred twenty-one million, nine hundred twenty-nine thousand, fifty-four".