451198961 has 4 divisors (see below), whose sum is σ = 451248624. Its totient is φ = 451149300.

The previous prime is 451198949. The next prime is 451198963. The reversal of 451198961 is 169891154.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 169891154 = 2 ⋅84945577.

It is a cyclic number.

It is not a de Polignac number, because 451198961 - 2¹⁴ = 451182577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451198963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6875 + ... + 30816.

It is an arithmetic number, because the mean of its divisors is an integer number (112812156).

Almost surely, 2^451198961 is an apocalyptic number.

It is an amenable number.

451198961 is a deficient number, since it is larger than the sum of its proper divisors (49663).

451198961 is a wasteful number, since it uses less digits than its factorization.

451198961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49662.

The product of its digits is 77760, while the sum is 44.

The square root of 451198961 is about 21241.4444188713. Note that the first 4 decimals coincide. The cubic root of 451198961 is about 766.9894030211.

The spelling of 451198961 in words is "four hundred fifty-one million, one hundred ninety-eight thousand, nine hundred sixty-one".