196861951 has 16 divisors (see below), whose sum is σ = 236926368. Its totient is φ = 161164800.

The previous prime is 196861939. The next prime is 196861963. The reversal of 196861951 is 159168691.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (196861939) and next prime (196861963).

It is a cyclic number.

It is not a de Polignac number, because 196861951 - 2¹⁷ = 196730879 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196861901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10926 + ... + 22651.

It is an arithmetic number, because the mean of its divisors is an integer number (14807898).

Almost surely, 2^196861951 is an apocalyptic number.

196861951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

196861951 is a deficient number, since it is larger than the sum of its proper divisors (40064417).

196861951 is a wasteful number, since it uses less digits than its factorization.

196861951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33642.

The product of its digits is 116640, while the sum is 46.

The square root of 196861951 is about 14030.7501937708. The cubic root of 196861951 is about 581.7288398424.

The spelling of 196861951 in words is "one hundred ninety-six million, eight hundred sixty-one thousand, nine hundred fifty-one".