149202997 has 2 divisors, whose sum is σ = 149202998. Its totient is φ = 149202996.

The previous prime is 149202971. The next prime is 149203013. The reversal of 149202997 is 799202941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125641681 + 23561316 = 11209^2 + 4854^2 .

It is an emirp because it is prime and its reverse (799202941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149202997 - 2⁷ = 149202869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149202947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74601498 + 74601499.

It is an arithmetic number, because the mean of its divisors is an integer number (74601499).

Almost surely, 2^149202997 is an apocalyptic number.

It is an amenable number.

149202997 is a deficient number, since it is larger than the sum of its proper divisors (1).

149202997 is an equidigital number, since it uses as much as digits as its factorization.

149202997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 149202997 is about 12214.8678666615. The cubic root of 149202997 is about 530.3865662075.

The spelling of 149202997 in words is "one hundred forty-nine million, two hundred two thousand, nine hundred ninety-seven".