145651091 has 2 divisors, whose sum is σ = 145651092. Its totient is φ = 145651090.

The previous prime is 145651067. The next prime is 145651123. The reversal of 145651091 is 190156541.

It is an a-pointer prime, because the next prime (145651123) can be obtained adding 145651091 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145651091 - 2⁶ = 145651027 is a prime.

It is not a weakly prime, because it can be changed into another prime (145651031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72825545 + 72825546.

It is an arithmetic number, because the mean of its divisors is an integer number (72825546).

Almost surely, 2^145651091 is an apocalyptic number.

145651091 is a deficient number, since it is larger than the sum of its proper divisors (1).

145651091 is an equidigital number, since it uses as much as digits as its factorization.

145651091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 145651091 is about 12068.5993802098. The cubic root of 145651091 is about 526.1439497203.

The spelling of 145651091 in words is "one hundred forty-five million, six hundred fifty-one thousand, ninety-one".