149489831 has 4 divisors (see below), whose sum is σ = 149539464. Its totient is φ = 149440200.

The previous prime is 149489803. The next prime is 149489869. The reversal of 149489831 is 138984941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138984941 = 241 ⋅576701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149489831 is a prime.

It is a super-2 number, since 2×149489831² = 44694419144817122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149489531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19985 + ... + 26426.

It is an arithmetic number, because the mean of its divisors is an integer number (37384866).

Almost surely, 2^149489831 is an apocalyptic number.

149489831 is a deficient number, since it is larger than the sum of its proper divisors (49633).

149489831 is an equidigital number, since it uses as much as digits as its factorization.

149489831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49632.

The product of its digits is 248832, while the sum is 47.

The square root of 149489831 is about 12226.6034122319. The cubic root of 149489831 is about 530.7262276498.

The spelling of 149489831 in words is "one hundred forty-nine million, four hundred eighty-nine thousand, eight hundred thirty-one".