55990747 has 2 divisors, whose sum is σ = 55990748. Its totient is φ = 55990746.

The previous prime is 55990723. The next prime is 55990751. The reversal of 55990747 is 74709955.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55990747 - 2¹⁹ = 55466459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55990697 and 55990706.

It is not a weakly prime, because it can be changed into another prime (55990787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27995373 + 27995374.

It is an arithmetic number, because the mean of its divisors is an integer number (27995374).

Almost surely, 2^55990747 is an apocalyptic number.

55990747 is a deficient number, since it is larger than the sum of its proper divisors (1).

55990747 is an equidigital number, since it uses as much as digits as its factorization.

55990747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 46.

The square root of 55990747 is about 7482.6965059396. The cubic root of 55990747 is about 382.5651635459.

The spelling of 55990747 in words is "fifty-five million, nine hundred ninety thousand, seven hundred forty-seven".