45381979 has 2 divisors, whose sum is σ = 45381980. Its totient is φ = 45381978.

The previous prime is 45381953. The next prime is 45381997. The reversal of 45381979 is 97918354.

It is a happy number.

Together with next prime (45381997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45381979 - 2²⁵ = 11827547 is a prime.

It is not a weakly prime, because it can be changed into another prime (45381929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22690989 + 22690990.

It is an arithmetic number, because the mean of its divisors is an integer number (22690990).

Almost surely, 2^45381979 is an apocalyptic number.

45381979 is a deficient number, since it is larger than the sum of its proper divisors (1).

45381979 is an equidigital number, since it uses as much as digits as its factorization.

45381979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 45381979 is about 6736.6148027032. The cubic root of 45381979 is about 356.6929099196.

Subtracting 45381979 from its reverse (97918354), we obtain a triangular number (52536375 = T₁₀₂₅₀).

It can be divided in two parts, 45381 and 979, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 45381979 in words is "forty-five million, three hundred eighty-one thousand, nine hundred seventy-nine".