153961091 has 4 divisors (see below), whose sum is σ = 153986184. Its totient is φ = 153936000.

The previous prime is 153961081. The next prime is 153961117. The reversal of 153961091 is 190169351.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 190169351 = 83 ⋅2291197.

It is a cyclic number.

It is not a de Polignac number, because 153961091 - 2¹⁰ = 153960067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153961081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3491 + ... + 17891.

It is an arithmetic number, because the mean of its divisors is an integer number (38496546).

Almost surely, 2^153961091 is an apocalyptic number.

153961091 is a deficient number, since it is larger than the sum of its proper divisors (25093).

153961091 is a wasteful number, since it uses less digits than its factorization.

153961091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25092.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 153961091 is about 12408.1058586716. The cubic root of 153961091 is about 535.9656952037.

The spelling of 153961091 in words is "one hundred fifty-three million, nine hundred sixty-one thousand, ninety-one".