672154969 has 4 divisors (see below), whose sum is σ = 672207120. Its totient is φ = 672102820.

The previous prime is 672154949. The next prime is 672154979. The reversal of 672154969 is 969451276.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 672154969 - 2⁷ = 672154841 is a prime.

It is a super-2 number, since 2×672154969² = 903584604702781922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672154909) 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, 8862 + ... + 37720.

It is an arithmetic number, because the mean of its divisors is an integer number (168051780).

Almost surely, 2^672154969 is an apocalyptic number.

It is an amenable number.

672154969 is a deficient number, since it is larger than the sum of its proper divisors (52151).

672154969 is a wasteful number, since it uses less digits than its factorization.

672154969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52150.

The product of its digits is 816480, while the sum is 49.

The square root of 672154969 is about 25925.9516508073. The cubic root of 672154969 is about 875.9711531301.

The spelling of 672154969 in words is "six hundred seventy-two million, one hundred fifty-four thousand, nine hundred sixty-nine".