153789949 has 4 divisors (see below), whose sum is σ = 155151036. Its totient is φ = 152428864.

The previous prime is 153789947. The next prime is 153790073. The reversal of 153789949 is 949987351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50665924 + 103124025 = 7118^2 + 10155^2 .

It is not a de Polignac number, because 153789949 - 2¹ = 153789947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 153789949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153789947) 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, 680374 + ... + 680599.

It is an arithmetic number, because the mean of its divisors is an integer number (38787759).

Almost surely, 2^153789949 is an apocalyptic number.

It is an amenable number.

153789949 is a deficient number, since it is larger than the sum of its proper divisors (1361087).

153789949 is a wasteful number, since it uses less digits than its factorization.

153789949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361086.

The product of its digits is 2449440, while the sum is 55.

The square root of 153789949 is about 12401.2075621691. The cubic root of 153789949 is about 535.7670297512.

The spelling of 153789949 in words is "one hundred fifty-three million, seven hundred eighty-nine thousand, nine hundred forty-nine".