149691953 has 8 divisors (see below), whose sum is σ = 159449472. Its totient is φ = 140040256.

The previous prime is 149691931. The next prime is 149691959. The reversal of 149691953 is 359196941.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149691953 - 2¹⁰ = 149690929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149691898 and 149691907.

It is not an unprimeable number, because it can be changed into a prime (149691959) 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 in 7 ways as a sum of consecutive naturals, for example, 23525 + ... + 29202.

It is an arithmetic number, because the mean of its divisors is an integer number (19931184).

Almost surely, 2^149691953 is an apocalyptic number.

It is an amenable number.

149691953 is a deficient number, since it is larger than the sum of its proper divisors (9757519).

149691953 is a wasteful number, since it uses less digits than its factorization.

149691953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52911.

The product of its digits is 262440, while the sum is 47.

The square root of 149691953 is about 12234.8662845166. The cubic root of 149691953 is about 530.9653144507.

The spelling of 149691953 in words is "one hundred forty-nine million, six hundred ninety-one thousand, nine hundred fifty-three".