65190557 has 2 divisors, whose sum is σ = 65190558. Its totient is φ = 65190556.

The previous prime is 65190553. The next prime is 65190571. The reversal of 65190557 is 75509156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65108761 + 81796 = 8069^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 65190557 - 2² = 65190553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65190557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65190553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32595278 + 32595279.

It is an arithmetic number, because the mean of its divisors is an integer number (32595279).

Almost surely, 2^65190557 is an apocalyptic number.

It is an amenable number.

65190557 is a deficient number, since it is larger than the sum of its proper divisors (1).

65190557 is an equidigital number, since it uses as much as digits as its factorization.

65190557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47250, while the sum is 38.

The square root of 65190557 is about 8074.0669429972. The cubic root of 65190557 is about 402.4651040307.

The spelling of 65190557 in words is "sixty-five million, one hundred ninety thousand, five hundred fifty-seven".