90870849 has 8 divisors (see below), whose sum is σ = 134623520. Its totient is φ = 60580548.

The previous prime is 90870847. The next prime is 90870851. The reversal of 90870849 is 94807809.

It is an interprime number because it is at equal distance from previous prime (90870847) and next prime (90870851).

It is not a de Polignac number, because 90870849 - 2¹ = 90870847 is a prime.

It is a super-2 number, since 2×90870849² = 16515022395961602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90870847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1682767 + ... + 1682820.

It is an arithmetic number, because the mean of its divisors is an integer number (16827940).

Almost surely, 2^90870849 is an apocalyptic number.

It is an amenable number.

90870849 is a deficient number, since it is larger than the sum of its proper divisors (43752671).

90870849 is a wasteful number, since it uses less digits than its factorization.

90870849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365596 (or 3365590 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 90870849 is about 9532.6202588795. The cubic root of 90870849 is about 449.5812549043.

It can be divided in two parts, 90870 and 849, that added together give a palindrome (91719).

The spelling of 90870849 in words is "ninety million, eight hundred seventy thousand, eight hundred forty-nine".