194749951 has 8 divisors (see below), whose sum is σ = 214441344. Its totient is φ = 175389720.

The previous prime is 194749913. The next prime is 194749979. The reversal of 194749951 is 159947491.

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

It is not a de Polignac number, because 194749951 - 2⁷ = 194749823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194749895 and 194749904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194749991) 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, 81555 + ... + 83908.

It is an arithmetic number, because the mean of its divisors is an integer number (26805168).

Almost surely, 2^194749951 is an apocalyptic number.

194749951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

194749951 is a deficient number, since it is larger than the sum of its proper divisors (19691393).

194749951 is a wasteful number, since it uses less digits than its factorization.

194749951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165581.

The product of its digits is 408240, while the sum is 49.

The square root of 194749951 is about 13955.2839813456. The cubic root of 194749951 is about 579.6410293599.

The spelling of 194749951 in words is "one hundred ninety-four million, seven hundred forty-nine thousand, nine hundred fifty-one".