55840739 has 2 divisors, whose sum is σ = 55840740. Its totient is φ = 55840738.

The previous prime is 55840721. The next prime is 55840777. The reversal of 55840739 is 93704855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55840739 - 2¹² = 55836643 is a prime.

It is a super-2 number, since 2×55840739² = 6236376264132242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55840696 and 55840705.

It is not a weakly prime, because it can be changed into another prime (55840339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27920369 + 27920370.

It is an arithmetic number, because the mean of its divisors is an integer number (27920370).

Almost surely, 2^55840739 is an apocalyptic number.

55840739 is a deficient number, since it is larger than the sum of its proper divisors (1).

55840739 is an equidigital number, since it uses as much as digits as its factorization.

55840739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 55840739 is about 7472.6661239480. Note that the first 3 decimals coincide. The cubic root of 55840739 is about 382.2232072710.

The spelling of 55840739 in words is "fifty-five million, eight hundred forty thousand, seven hundred thirty-nine".