78233951 has 2 divisors, whose sum is σ = 78233952. Its totient is φ = 78233950.

The previous prime is 78233921. The next prime is 78233993. The reversal of 78233951 is 15933287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78233951 - 2¹⁴ = 78217567 is a prime.

It is a super-2 number, since 2×78233951² = 12241102178140802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78233921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39116975 + 39116976.

It is an arithmetic number, because the mean of its divisors is an integer number (39116976).

Almost surely, 2^78233951 is an apocalyptic number.

78233951 is a deficient number, since it is larger than the sum of its proper divisors (1).

78233951 is an equidigital number, since it uses as much as digits as its factorization.

78233951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 78233951 is about 8844.9958168447. The cubic root of 78233951 is about 427.6926181911.

The spelling of 78233951 in words is "seventy-eight million, two hundred thirty-three thousand, nine hundred fifty-one".