149719797 has 12 divisors (see below), whose sum is σ = 222107340. Its totient is φ = 97115328.

The previous prime is 149719793. The next prime is 149719813. The reversal of 149719797 is 797917941.

It can be written as a sum of positive squares in 2 ways, for example, as 112338801 + 37380996 = 10599^2 + 6114^2 .

It is not a de Polignac number, because 149719797 - 2² = 149719793 is a prime.

It is a super-2 number, since 2×149719797² = 44832035227442418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149719793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224472 + ... + 225137.

It is an arithmetic number, because the mean of its divisors is an integer number (18508945).

Almost surely, 2^149719797 is an apocalyptic number.

It is an amenable number.

149719797 is a deficient number, since it is larger than the sum of its proper divisors (72387543).

149719797 is a wasteful number, since it uses less digits than its factorization.

149719797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449652 (or 449649 counting only the distinct ones).

The product of its digits is 1000188, while the sum is 54.

The square root of 149719797 is about 12236.0041271650. The cubic root of 149719797 is about 530.9982337924.

The spelling of 149719797 in words is "one hundred forty-nine million, seven hundred nineteen thousand, seven hundred ninety-seven".