1672619961 has 8 divisors (see below), whose sum is σ = 2327123520. Its totient is φ = 1066598192.

The previous prime is 1672619957. The next prime is 1672619983. The reversal of 1672619961 is 1699162761.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1672619961 - 2² = 1672619957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1672619961.

It is not an unprimeable number, because it can be changed into a prime (1672619941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12120366 + ... + 12120503.

It is an arithmetic number, because the mean of its divisors is an integer number (290890440).

Almost surely, 2^1672619961 is an apocalyptic number.

It is an amenable number.

1672619961 is a deficient number, since it is larger than the sum of its proper divisors (654503559).

1672619961 is a wasteful number, since it uses less digits than its factorization.

1672619961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24240895.

The product of its digits is 244944, while the sum is 48.

The square root of 1672619961 is about 40897.6767188553. The cubic root of 1672619961 is about 1187.0411061759.

The spelling of 1672619961 in words is "one billion, six hundred seventy-two million, six hundred nineteen thousand, nine hundred sixty-one".