55357397 has 2 divisors, whose sum is σ = 55357398. Its totient is φ = 55357396.

The previous prime is 55357381. The next prime is 55357417. The reversal of 55357397 is 79375355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37834801 + 17522596 = 6151^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 55357397 - 2⁴ = 55357381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55357097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27678698 + 27678699.

It is an arithmetic number, because the mean of its divisors is an integer number (27678699).

Almost surely, 2^55357397 is an apocalyptic number.

It is an amenable number.

55357397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55357397 is an equidigital number, since it uses as much as digits as its factorization.

55357397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 496125, while the sum is 44.

The square root of 55357397 is about 7440.2551703554. The cubic root of 55357397 is about 381.1172038800.

The spelling of 55357397 in words is "fifty-five million, three hundred fifty-seven thousand, three hundred ninety-seven".