149077997 has 2 divisors, whose sum is σ = 149077998. Its totient is φ = 149077996.

The previous prime is 149077993. The next prime is 149078023. The reversal of 149077997 is 799770941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148328041 + 749956 = 12179^2 + 866^2 .

It is a cyclic number.

It is not a de Polignac number, because 149077997 - 2² = 149077993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149077993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74538998 + 74538999.

It is an arithmetic number, because the mean of its divisors is an integer number (74538999).

Almost surely, 2^149077997 is an apocalyptic number.

It is an amenable number.

149077997 is a deficient number, since it is larger than the sum of its proper divisors (1).

149077997 is an equidigital number, since it uses as much as digits as its factorization.

149077997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000188, while the sum is 53.

The square root of 149077997 is about 12209.7500793423. The cubic root of 149077997 is about 530.2384082274.

The spelling of 149077997 in words is "one hundred forty-nine million, seventy-seven thousand, nine hundred ninety-seven".