149620973 has 6 divisors (see below), whose sum is σ = 154604142. Its totient is φ = 144793560.

The previous prime is 149620969. The next prime is 149621011. The reversal of 149620973 is 379026941.

149620973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 125933284 + 23687689 = 11222^2 + 4867^2 .

It is not a de Polignac number, because 149620973 - 2² = 149620969 is a prime.

It is a super-2 number, since 2×149620973² = 44772871122933458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 149620973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149620943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76886 + ... + 78807.

It is an arithmetic number, because the mean of its divisors is an integer number (25767357).

Almost surely, 2^149620973 is an apocalyptic number.

It is an amenable number.

149620973 is a deficient number, since it is larger than the sum of its proper divisors (4983169).

149620973 is an equidigital number, since it uses as much as digits as its factorization.

149620973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155755 (or 155724 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 149620973 is about 12231.9652141428. The cubic root of 149620973 is about 530.8813779048.

The spelling of 149620973 in words is "one hundred forty-nine million, six hundred twenty thousand, nine hundred seventy-three".