149171677 has 2 divisors, whose sum is σ = 149171678. Its totient is φ = 149171676.

The previous prime is 149171663. The next prime is 149171689. The reversal of 149171677 is 776171941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115369081 + 33802596 = 10741^2 + 5814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149171677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149178677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74585838 + 74585839.

It is an arithmetic number, because the mean of its divisors is an integer number (74585839).

Almost surely, 2^149171677 is an apocalyptic number.

It is an amenable number.

149171677 is a deficient number, since it is larger than the sum of its proper divisors (1).

149171677 is an equidigital number, since it uses as much as digits as its factorization.

149171677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 43.

The square root of 149171677 is about 12213.5857552154. The cubic root of 149171677 is about 530.3494515157.

The spelling of 149171677 in words is "one hundred forty-nine million, one hundred seventy-one thousand, six hundred seventy-seven".