90970449 has 4 divisors (see below), whose sum is σ = 121293936. Its totient is φ = 60646964.

The previous prime is 90970433. The next prime is 90970469. The reversal of 90970449 is 94407909.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94407909 = 3 ⋅31469303.

It is a cyclic number.

It is not a de Polignac number, because 90970449 - 2⁴ = 90970433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90970449.

It is not an unprimeable number, because it can be changed into a prime (90970469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15161739 + ... + 15161744.

It is an arithmetic number, because the mean of its divisors is an integer number (30323484).

Almost surely, 2^90970449 is an apocalyptic number.

It is an amenable number.

90970449 is a deficient number, since it is larger than the sum of its proper divisors (30323487).

90970449 is a wasteful number, since it uses less digits than its factorization.

90970449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30323486.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 90970449 is about 9537.8429951431. The cubic root of 90970449 is about 449.7454510997.

It can be divided in two parts, 90970 and 449, that added together give a palindrome (91419).

The spelling of 90970449 in words is "ninety million, nine hundred seventy thousand, four hundred forty-nine".