149779931 has 8 divisors (see below), whose sum is σ = 172942560. Its totient is φ = 127058688.

The previous prime is 149779921. The next prime is 149779939. The reversal of 149779931 is 139977941.

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 149779931 - 2¹⁴ = 149763547 is a prime.

It is a super-2 number, since 2×149779931² = 44868055460729522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 149779931.

It is not an unprimeable number, because it can be changed into a prime (149779939) 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, 109616 + ... + 110973.

It is an arithmetic number, because the mean of its divisors is an integer number (21617820).

Almost surely, 2^149779931 is an apocalyptic number.

149779931 is a deficient number, since it is larger than the sum of its proper divisors (23162629).

149779931 is an equidigital number, since it uses as much as digits as its factorization.

149779931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220693.

The product of its digits is 428652, while the sum is 50.

The square root of 149779931 is about 12238.4611369240. The cubic root of 149779931 is about 531.0693149596.

The spelling of 149779931 in words is "one hundred forty-nine million, seven hundred seventy-nine thousand, nine hundred thirty-one".