1691925474 has 8 divisors (see below), whose sum is σ = 3383850960. Its totient is φ = 563975156.

The previous prime is 1691925467. The next prime is 1691925479. The reversal of 1691925474 is 4745291961.

It is a happy number.

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

1691925474 is an admirable number.

It is a super-2 number, since 2×1691925474² = 5725223619140249352, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1691925479) 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 in 3 ways as a sum of consecutive naturals, for example, 140993784 + ... + 140993795.

It is an arithmetic number, because the mean of its divisors is an integer number (422981370).

Almost surely, 2^1691925474 is an apocalyptic number.

1691925474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1691925474 is a wasteful number, since it uses less digits than its factorization.

1691925474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281987584.

The product of its digits is 544320, while the sum is 48.

The square root of 1691925474 is about 41133.0216979011. The cubic root of 1691925474 is about 1191.5906215665.

The spelling of 1691925474 in words is "one billion, six hundred ninety-one million, nine hundred twenty-five thousand, four hundred seventy-four".