101990479 has 2 divisors, whose sum is σ = 101990480. Its totient is φ = 101990478.

The previous prime is 101990431. The next prime is 101990489. The reversal of 101990479 is 974099101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101990479 - 2¹¹ = 101988431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101990489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50995239 + 50995240.

It is an arithmetic number, because the mean of its divisors is an integer number (50995240).

Almost surely, 2^101990479 is an apocalyptic number.

101990479 is a deficient number, since it is larger than the sum of its proper divisors (1).

101990479 is an equidigital number, since it uses as much as digits as its factorization.

101990479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 101990479 is about 10099.0335676242. The cubic root of 101990479 is about 467.2183347224.

The spelling of 101990479 in words is "one hundred one million, nine hundred ninety thousand, four hundred seventy-nine".