65377391 has 2 divisors, whose sum is σ = 65377392. Its totient is φ = 65377390.

The previous prime is 65377387. The next prime is 65377451. The reversal of 65377391 is 19377356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65377391 - 2² = 65377387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65377331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32688695 + 32688696.

It is an arithmetic number, because the mean of its divisors is an integer number (32688696).

Almost surely, 2^65377391 is an apocalyptic number.

65377391 is a deficient number, since it is larger than the sum of its proper divisors (1).

65377391 is an equidigital number, since it uses as much as digits as its factorization.

65377391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 41.

The square root of 65377391 is about 8085.6286706724. The cubic root of 65377391 is about 402.8492212413.

The spelling of 65377391 in words is "sixty-five million, three hundred seventy-seven thousand, three hundred ninety-one".