149943974 has 4 divisors (see below), whose sum is σ = 224915964. Its totient is φ = 74971986.

The previous prime is 149943973. The next prime is 149943979. The reversal of 149943974 is 479349941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 479349941 = 7 ⋅68478563.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149943973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37485992 + ... + 37485995.

It is an arithmetic number, because the mean of its divisors is an integer number (56228991).

Almost surely, 2^149943974 is an apocalyptic number.

149943974 is a deficient number, since it is larger than the sum of its proper divisors (74971990).

149943974 is an equidigital number, since it uses as much as digits as its factorization.

149943974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74971989.

The product of its digits is 979776, while the sum is 50.

The square root of 149943974 is about 12245.1612484279. The cubic root of 149943974 is about 531.2631246769.

The spelling of 149943974 in words is "one hundred forty-nine million, nine hundred forty-three thousand, nine hundred seventy-four".