147940861 has 16 divisors (see below), whose sum is σ = 157638960. Its totient is φ = 138611200.

The previous prime is 147940847. The next prime is 147940867. The reversal of 147940861 is 168049741.

It can be written as a sum of positive squares in 8 ways, for example, as 20115225 + 127825636 = 4485^2 + 11306^2 .

It is a cyclic number.

It is not a de Polignac number, because 147940861 - 2⁷ = 147940733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147940867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154761 + ... + 155713.

It is an arithmetic number, because the mean of its divisors is an integer number (9852435).

Almost surely, 2^147940861 is an apocalyptic number.

It is an amenable number.

147940861 is a deficient number, since it is larger than the sum of its proper divisors (9698099).

147940861 is a wasteful number, since it uses less digits than its factorization.

147940861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 147940861 is about 12163.0942198110. The cubic root of 147940861 is about 528.8867829221.

The spelling of 147940861 in words is "one hundred forty-seven million, nine hundred forty thousand, eight hundred sixty-one".