45347981 has 6 divisors (see below), whose sum is σ = 52751790. Its totient is φ = 38869656.

The previous prime is 45347969. The next prime is 45347983. The reversal of 45347981 is 18974354.

It can be written as a sum of positive squares in only one way, i.e., 45346756 + 1225 = 6734^2 + 35^2 .

It is not a de Polignac number, because 45347981 - 2¹⁰ = 45346957 is a prime.

It is a super-2 number, since 2×45347981² = 4112878761552722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45347983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 462686 + ... + 462783.

It is an arithmetic number, because the mean of its divisors is an integer number (8791965).

Almost surely, 2^45347981 is an apocalyptic number.

It is an amenable number.

45347981 is a deficient number, since it is larger than the sum of its proper divisors (7403809).

45347981 is an equidigital number, since it uses as much as digits as its factorization.

45347981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925483 (or 925476 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 45347981 is about 6734.0909557267. The cubic root of 45347981 is about 356.6038152660.

The spelling of 45347981 in words is "forty-five million, three hundred forty-seven thousand, nine hundred eighty-one".