147921965 has 4 divisors (see below), whose sum is σ = 177506364. Its totient is φ = 118337568.

The previous prime is 147921937. The next prime is 147921979. The reversal of 147921965 is 569129741.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18826921 + 129095044 = 4339^2 + 11362^2 .

It is a cyclic number.

It is not a de Polignac number, because 147921965 - 2¹⁴ = 147905581 is a prime.

It is a super-2 number, since 2×147921965² = 43761815458922450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14792192 + ... + 14792201.

It is an arithmetic number, because the mean of its divisors is an integer number (44376591).

Almost surely, 2^147921965 is an apocalyptic number.

It is an amenable number.

147921965 is a deficient number, since it is larger than the sum of its proper divisors (29584399).

147921965 is an equidigital number, since it uses as much as digits as its factorization.

147921965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29584398.

The product of its digits is 136080, while the sum is 44.

The square root of 147921965 is about 12162.3174189790. The cubic root of 147921965 is about 528.8642643064.

The spelling of 147921965 in words is "one hundred forty-seven million, nine hundred twenty-one thousand, nine hundred sixty-five".