1978954654 has 8 divisors (see below), whose sum is σ = 2968751808. Its totient is φ = 989370720.

The previous prime is 1978954639. The next prime is 1978954669. The reversal of 1978954654 is 4564598791.

It is an interprime number because it is at equal distance from previous prime (1978954639) and next prime (1978954669).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27627 + ... + 68710.

It is an arithmetic number, because the mean of its divisors is an integer number (371093976).

Almost surely, 2^1978954654 is an apocalyptic number.

1978954654 is a deficient number, since it is larger than the sum of its proper divisors (989797154).

1978954654 is a wasteful number, since it uses less digits than its factorization.

1978954654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106610.

The product of its digits is 10886400, while the sum is 58.

The square root of 1978954654 is about 44485.4431696482. The cubic root of 1978954654 is about 1255.4862121407.

The spelling of 1978954654 in words is "one billion, nine hundred seventy-eight million, nine hundred fifty-four thousand, six hundred fifty-four".