154721963 has 4 divisors (see below), whose sum is σ = 168787608. Its totient is φ = 140656320.

The previous prime is 154721939. The next prime is 154721969. The reversal of 154721963 is 369127451.

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

It is a cyclic number.

It is not a de Polignac number, because 154721963 - 2¹⁸ = 154459819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154721969) 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, 7032806 + ... + 7032827.

It is an arithmetic number, because the mean of its divisors is an integer number (42196902).

Almost surely, 2^154721963 is an apocalyptic number.

154721963 is a deficient number, since it is larger than the sum of its proper divisors (14065645).

154721963 is a wasteful number, since it uses less digits than its factorization.

154721963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14065644.

The product of its digits is 45360, while the sum is 38.

The square root of 154721963 is about 12438.7283514031. The cubic root of 154721963 is about 536.8471545923.

The spelling of 154721963 in words is "one hundred fifty-four million, seven hundred twenty-one thousand, nine hundred sixty-three".