722154749 has 4 divisors (see below), whose sum is σ = 734394720. Its totient is φ = 709914780.

The previous prime is 722154731. The next prime is 722154761. The reversal of 722154749 is 947451227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 947451227 = 6121 ⋅154787.

It is a cyclic number.

It is not a de Polignac number, because 722154749 - 2¹⁶ = 722089213 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 (722154709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6119897 + ... + 6120014.

It is an arithmetic number, because the mean of its divisors is an integer number (183598680).

Almost surely, 2^722154749 is an apocalyptic number.

It is an amenable number.

722154749 is a deficient number, since it is larger than the sum of its proper divisors (12239971).

722154749 is a wasteful number, since it uses less digits than its factorization.

722154749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12239970.

The product of its digits is 141120, while the sum is 41.

The square root of 722154749 is about 26872.9371115254. The cubic root of 722154749 is about 897.1741609366.

The spelling of 722154749 in words is "seven hundred twenty-two million, one hundred fifty-four thousand, seven hundred forty-nine".