1953299421 has 8 divisors (see below), whose sum is σ = 2893776960. Its totient is φ = 1302199596.

The previous prime is 1953299419. The next prime is 1953299423. The reversal of 1953299421 is 1249923591.

1953299421 is a `hidden beast` number, since 1 + 9 + 532 + 9 + 94 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (1953299419) and next prime (1953299423).

It is not a de Polignac number, because 1953299421 - 2¹ = 1953299419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1953299423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36172185 + ... + 36172238.

It is an arithmetic number, because the mean of its divisors is an integer number (361722120).

Almost surely, 2^1953299421 is an apocalyptic number.

It is an amenable number.

1953299421 is a deficient number, since it is larger than the sum of its proper divisors (940477539).

1953299421 is an equidigital number, since it uses as much as digits as its factorization.

1953299421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72344432 (or 72344426 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 1953299421 is about 44196.1471284545. The cubic root of 1953299421 is about 1250.0372087057.

The spelling of 1953299421 in words is "one billion, nine hundred fifty-three million, two hundred ninety-nine thousand, four hundred twenty-one".