721341077 has 16 divisors (see below), whose sum is σ = 764854272. Its totient is φ = 679311360.

The previous prime is 721341073. The next prime is 721341079. The reversal of 721341077 is 770143127.

It is a cyclic number.

It is not a de Polignac number, because 721341077 - 2² = 721341073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721341073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206933 + ... + 210389.

It is an arithmetic number, because the mean of its divisors is an integer number (47803392).

Almost surely, 2^721341077 is an apocalyptic number.

It is an amenable number.

721341077 is a deficient number, since it is larger than the sum of its proper divisors (43513195).

721341077 is a wasteful number, since it uses less digits than its factorization.

721341077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 721341077 is about 26857.7935988793. The cubic root of 721341077 is about 896.8370772118.

The spelling of 721341077 in words is "seven hundred twenty-one million, three hundred forty-one thousand, seventy-seven".