165072377 has 2 divisors, whose sum is σ = 165072378. Its totient is φ = 165072376.

The previous prime is 165072353. The next prime is 165072421. The reversal of 165072377 is 773270561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118026496 + 47045881 = 10864^2 + 6859^2 .

It is a cyclic number.

It is not a de Polignac number, because 165072377 - 2²⁶ = 97963513 is a prime.

It is equal to p_9242759 and since 165072377 and 9242759 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165072377.

It is not a weakly prime, because it can be changed into another prime (165072337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82536188 + 82536189.

It is an arithmetic number, because the mean of its divisors is an integer number (82536189).

Almost surely, 2^165072377 is an apocalyptic number.

It is an amenable number.

165072377 is a deficient number, since it is larger than the sum of its proper divisors (1).

165072377 is an equidigital number, since it uses as much as digits as its factorization.

165072377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61740, while the sum is 38.

The square root of 165072377 is about 12848.0495406890. The cubic root of 165072377 is about 548.5608402562.

The spelling of 165072377 in words is "one hundred sixty-five million, seventy-two thousand, three hundred seventy-seven".