1953779654 has 4 divisors (see below), whose sum is σ = 2930669484. Its totient is φ = 976889826.

The previous prime is 1953779629. The next prime is 1953779657. The reversal of 1953779654 is 4569773591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4569773591 = 139 ⋅32876069.

It is a self number, because there is not a number n which added to its sum of digits gives 1953779654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1953779657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488444912 + ... + 488444915.

It is an arithmetic number, because the mean of its divisors is an integer number (732667371).

Almost surely, 2^1953779654 is an apocalyptic number.

1953779654 is a deficient number, since it is larger than the sum of its proper divisors (976889830).

1953779654 is an equidigital number, since it uses as much as digits as its factorization.

1953779654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976889829.

The product of its digits is 7144200, while the sum is 56.

The square root of 1953779654 is about 44201.5797681486. The cubic root of 1953779654 is about 1250.1396439191.

The spelling of 1953779654 in words is "one billion, nine hundred fifty-three million, seven hundred seventy-nine thousand, six hundred fifty-four".