722534397 has 16 divisors (see below), whose sum is σ = 1082594688. Its totient is φ = 425304000.

The previous prime is 722534387. The next prime is 722534401. The reversal of 722534397 is 793435227.

It is not a de Polignac number, because 722534397 - 2¹⁸ = 722272253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722534347) 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, 401854 + ... + 403647.

It is an arithmetic number, because the mean of its divisors is an integer number (67662168).

Almost surely, 2^722534397 is an apocalyptic number.

It is an amenable number.

722534397 is a deficient number, since it is larger than the sum of its proper divisors (360060291).

722534397 is a wasteful number, since it uses less digits than its factorization.

722534397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805540.

The product of its digits is 317520, while the sum is 42.

The square root of 722534397 is about 26879.9999441964. Note that the first 4 decimals coincide. The cubic root of 722534397 is about 897.3313528708.

The spelling of 722534397 in words is "seven hundred twenty-two million, five hundred thirty-four thousand, three hundred ninety-seven".