148071981 has 8 divisors (see below), whose sum is σ = 197589024. Its totient is φ = 98634800.

The previous prime is 148071977. The next prime is 148072003. The reversal of 148071981 is 189170841.

148071981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 148071981 - 2² = 148071977 is a prime.

It is a super-2 number, since 2×148071981² = 43850623114528722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148071481) 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, 15495 + ... + 23156.

It is an arithmetic number, because the mean of its divisors is an integer number (24698628).

Almost surely, 2^148071981 is an apocalyptic number.

It is an amenable number.

148071981 is a deficient number, since it is larger than the sum of its proper divisors (49517043).

148071981 is a wasteful number, since it uses less digits than its factorization.

148071981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39931.

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 148071981 is about 12168.4831018496. The cubic root of 148071981 is about 529.0429875861.

The spelling of 148071981 in words is "one hundred forty-eight million, seventy-one thousand, nine hundred eighty-one".