149031797 has 2 divisors, whose sum is σ = 149031798. Its totient is φ = 149031796.

The previous prime is 149031739. The next prime is 149031821. The reversal of 149031797 is 797130941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141158161 + 7873636 = 11881^2 + 2806^2 .

It is a cyclic number.

It is not a de Polignac number, because 149031797 - 2⁶ = 149031733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149034797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74515898 + 74515899.

It is an arithmetic number, because the mean of its divisors is an integer number (74515899).

Almost surely, 2^149031797 is an apocalyptic number.

It is an amenable number.

149031797 is a deficient number, since it is larger than the sum of its proper divisors (1).

149031797 is an equidigital number, since it uses as much as digits as its factorization.

149031797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 149031797 is about 12207.8580021231. The cubic root of 149031797 is about 530.1836280766.

The spelling of 149031797 in words is "one hundred forty-nine million, thirty-one thousand, seven hundred ninety-seven".