153978941 has 4 divisors (see below), whose sum is σ = 158140572. Its totient is φ = 149817312.

The previous prime is 153978917. The next prime is 153978947. The reversal of 153978941 is 149879351.

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 119814916 + 34164025 = 10946^2 + 5845^2 .

It is a cyclic number.

It is not a de Polignac number, because 153978941 - 2¹⁰ = 153977917 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 (153978947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2080760 + ... + 2080833.

It is an arithmetic number, because the mean of its divisors is an integer number (39535143).

Almost surely, 2^153978941 is an apocalyptic number.

It is an amenable number.

153978941 is a deficient number, since it is larger than the sum of its proper divisors (4161631).

153978941 is an equidigital number, since it uses as much as digits as its factorization.

153978941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161630.

The product of its digits is 272160, while the sum is 47.

The square root of 153978941 is about 12408.8251256918. The cubic root of 153978941 is about 535.9864074020.

The spelling of 153978941 in words is "one hundred fifty-three million, nine hundred seventy-eight thousand, nine hundred forty-one".