141979921 has 2 divisors, whose sum is σ = 141979922. Its totient is φ = 141979920.

The previous prime is 141979909. The next prime is 141979927. The reversal of 141979921 is 129979141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 8346321 = 11560^2 + 2889^2 .

It is a cyclic number.

It is not a de Polignac number, because 141979921 - 2⁷ = 141979793 is a prime.

It is not a weakly prime, because it can be changed into another prime (141979927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70989960 + 70989961.

It is an arithmetic number, because the mean of its divisors is an integer number (70989961).

Almost surely, 2^141979921 is an apocalyptic number.

It is an amenable number.

141979921 is a deficient number, since it is larger than the sum of its proper divisors (1).

141979921 is an equidigital number, since it uses as much as digits as its factorization.

141979921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 43.

The square root of 141979921 is about 11915.5327619037. The cubic root of 141979921 is about 521.6857532760.

The spelling of 141979921 in words is "one hundred forty-one million, nine hundred seventy-nine thousand, nine hundred twenty-one".