145821677 has 2 divisors, whose sum is σ = 145821678. Its totient is φ = 145821676.

The previous prime is 145821653. The next prime is 145821691. The reversal of 145821677 is 776128541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76282756 + 69538921 = 8734^2 + 8339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145821677 is a prime.

It is a super-2 number, since 2×145821677² = 42527922966184658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145821647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72910838 + 72910839.

It is an arithmetic number, because the mean of its divisors is an integer number (72910839).

Almost surely, 2^145821677 is an apocalyptic number.

It is an amenable number.

145821677 is a deficient number, since it is larger than the sum of its proper divisors (1).

145821677 is an equidigital number, since it uses as much as digits as its factorization.

145821677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 145821677 is about 12075.6646607961. The cubic root of 145821677 is about 526.3492755086.

The spelling of 145821677 in words is "one hundred forty-five million, eight hundred twenty-one thousand, six hundred seventy-seven".