1622073749 has 4 divisors (see below), whose sum is σ = 1632960300. Its totient is φ = 1611187200.

The previous prime is 1622073743. The next prime is 1622073779. The reversal of 1622073749 is 9473702261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9473702261 = 39659 ⋅238879.

It can be written as a sum of positive squares in 2 ways, for example, as 697488100 + 924585649 = 26410^2 + 30407^2 .

It is a cyclic number.

It is not a de Polignac number, because 1622073749 - 2⁸ = 1622073493 is a prime.

It is a super-2 number, since 2×1622073749² = 5262246494389830002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622073743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5443052 + ... + 5443349.

It is an arithmetic number, because the mean of its divisors is an integer number (408240075).

Almost surely, 2^1622073749 is an apocalyptic number.

It is an amenable number.

1622073749 is a deficient number, since it is larger than the sum of its proper divisors (10886551).

1622073749 is a wasteful number, since it uses less digits than its factorization.

1622073749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10886550.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 1622073749 is about 40274.9767101112. The cubic root of 1622073749 is about 1174.9612177331.

The spelling of 1622073749 in words is "one billion, six hundred twenty-two million, seventy-three thousand, seven hundred forty-nine".