1958423 has 2 divisors, whose sum is σ = 1958424. Its totient is φ = 1958422.

The previous prime is 1958419. The next prime is 1958431. The reversal of 1958423 is 3248591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1958423 - 2² = 1958419 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1958423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1958413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979211 + 979212.

It is an arithmetic number, because the mean of its divisors is an integer number (979212).

2^1958423 is an apocalyptic number.

1958423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1958423 is an equidigital number, since it uses as much as digits as its factorization.

1958423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 1958423 is about 1399.4366723793. The cubic root of 1958423 is about 125.1129219583.

The spelling of 1958423 in words is "one million, nine hundred fifty-eight thousand, four hundred twenty-three".