45991019 has 2 divisors, whose sum is σ = 45991020. Its totient is φ = 45991018.

The previous prime is 45990983. The next prime is 45991021. The reversal of 45991019 is 91019954.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45991019 is a prime.

It is a super-2 number, since 2×45991019² = 4230347657316722, which contains 22 as substring.

Together with 45991021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45991079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22995509 + 22995510.

It is an arithmetic number, because the mean of its divisors is an integer number (22995510).

Almost surely, 2^45991019 is an apocalyptic number.

45991019 is a deficient number, since it is larger than the sum of its proper divisors (1).

45991019 is an equidigital number, since it uses as much as digits as its factorization.

45991019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 45991019 is about 6781.6678627016. The cubic root of 45991019 is about 358.2814672122.

It can be divided in two parts, 459910 and 19, that multiplied together give a triangular number (8738290 = T₄₁₈₀).

The spelling of 45991019 in words is "forty-five million, nine hundred ninety-one thousand, nineteen".