53447657 has 2 divisors, whose sum is σ = 53447658. Its totient is φ = 53447656.

The previous prime is 53447633. The next prime is 53447701. The reversal of 53447657 is 75674435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37994896 + 15452761 = 6164^2 + 3931^2 .

It is a cyclic number.

It is not a de Polignac number, because 53447657 - 2¹⁸ = 53185513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53447257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26723828 + 26723829.

It is an arithmetic number, because the mean of its divisors is an integer number (26723829).

Almost surely, 2^53447657 is an apocalyptic number.

It is an amenable number.

53447657 is a deficient number, since it is larger than the sum of its proper divisors (1).

53447657 is an equidigital number, since it uses as much as digits as its factorization.

53447657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 41.

The square root of 53447657 is about 7310.7904497393. The cubic root of 53447657 is about 376.6831763284.

The spelling of 53447657 in words is "fifty-three million, four hundred forty-seven thousand, six hundred fifty-seven".