147399981 has 8 divisors (see below), whose sum is σ = 197025024. Its totient is φ = 98020800.

The previous prime is 147399907. The next prime is 147399983. The reversal of 147399981 is 189993741.

It is a happy number.

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

It is not a de Polignac number, because 147399981 - 2¹⁰ = 147398957 is a prime.

It is a super-2 number, since 2×147399981² = 43453508797600722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147399983) 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, 60061 + ... + 62466.

It is an arithmetic number, because the mean of its divisors is an integer number (24628128).

Almost surely, 2^147399981 is an apocalyptic number.

It is an amenable number.

147399981 is a deficient number, since it is larger than the sum of its proper divisors (49625043).

147399981 is a wasteful number, since it uses less digits than its factorization.

147399981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122931.

The product of its digits is 489888, while the sum is 51.

The square root of 147399981 is about 12140.8393861380. The cubic root of 147399981 is about 528.2414493446.

The spelling of 147399981 in words is "one hundred forty-seven million, three hundred ninety-nine thousand, nine hundred eighty-one".