149378831 has 8 divisors (see below), whose sum is σ = 174351360. Its totient is φ = 125314488.

The previous prime is 149378807. The next prime is 149378837. The reversal of 149378831 is 138873941.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149378831 is a prime.

It is a super-2 number, since 2×149378831² = 44628070301853122, 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 (149378837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226691 + ... + 227348.

It is an arithmetic number, because the mean of its divisors is an integer number (21793920).

Almost surely, 2^149378831 is an apocalyptic number.

149378831 is a deficient number, since it is larger than the sum of its proper divisors (24972529).

149378831 is an equidigital number, since it uses as much as digits as its factorization.

149378831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454093.

The product of its digits is 145152, while the sum is 44.

The square root of 149378831 is about 12222.0632873505. The cubic root of 149378831 is about 530.5948358850.

The spelling of 149378831 in words is "one hundred forty-nine million, three hundred seventy-eight thousand, eight hundred thirty-one".