1953491 has 2 divisors, whose sum is σ = 1953492. Its totient is φ = 1953490.

The previous prime is 1953481. The next prime is 1953493. The reversal of 1953491 is 1943591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1953491 is a prime.

It is a super-2 number, since 2×1953491² = 7632254174162, which contains 22 as substring.

Together with 1953493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1953493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976745 + 976746.

It is an arithmetic number, because the mean of its divisors is an integer number (976746).

2^1953491 is an apocalyptic number.

1953491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953491 is an equidigital number, since it uses as much as digits as its factorization.

1953491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 32.

The square root of 1953491 is about 1397.6734239442. The cubic root of 1953491 is about 125.0078075123.

The spelling of 1953491 in words is "one million, nine hundred fifty-three thousand, four hundred ninety-one".