352401991 has 2 divisors, whose sum is σ = 352401992. Its totient is φ = 352401990.

The previous prime is 352401979. The next prime is 352402031. The reversal of 352401991 is 199104253.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-352401991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (352401961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176200995 + 176200996.

It is an arithmetic number, because the mean of its divisors is an integer number (176200996).

Almost surely, 2^352401991 is an apocalyptic number.

352401991 is a deficient number, since it is larger than the sum of its proper divisors (1).

352401991 is an equidigital number, since it uses as much as digits as its factorization.

352401991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 352401991 is about 18772.3730785428. The cubic root of 352401991 is about 706.3383466790.

The spelling of 352401991 in words is "three hundred fifty-two million, four hundred one thousand, nine hundred ninety-one".