1623075949 has 4 divisors (see below), whose sum is σ = 1770628320. Its totient is φ = 1475523580.

The previous prime is 1623075947. The next prime is 1623075953. The reversal of 1623075949 is 9495703261.

It is a happy number.

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: 9495703261 = 11 ⋅863245751.

It is a cyclic number.

It is not a de Polignac number, because 1623075949 - 2¹ = 1623075947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1623075899 and 1623075908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623075943) 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, 73776169 + ... + 73776190.

It is an arithmetic number, because the mean of its divisors is an integer number (442657080).

Almost surely, 2^1623075949 is an apocalyptic number.

It is an amenable number.

1623075949 is a deficient number, since it is larger than the sum of its proper divisors (147552371).

1623075949 is a wasteful number, since it uses less digits than its factorization.

1623075949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147552370.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 1623075949 is about 40287.4167575932. The cubic root of 1623075949 is about 1175.2031515951.

The spelling of 1623075949 in words is "one billion, six hundred twenty-three million, seventy-five thousand, nine hundred forty-nine".