90420037 has 4 divisors (see below), whose sum is σ = 91952640. Its totient is φ = 88887436.

The previous prime is 90420023. The next prime is 90420103. The reversal of 90420037 is 73002409.

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: 73002409 = 73 ⋅1000033.

It is a cyclic number.

It is not a de Polignac number, because 90420037 - 2⁷ = 90419909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90419993 and 90420020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90420017) 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, 766213 + ... + 766330.

It is an arithmetic number, because the mean of its divisors is an integer number (22988160).

Almost surely, 2^90420037 is an apocalyptic number.

It is an amenable number.

90420037 is a deficient number, since it is larger than the sum of its proper divisors (1532603).

90420037 is a wasteful number, since it uses less digits than its factorization.

90420037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532602.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 90420037 is about 9508.9451044793. The cubic root of 90420037 is about 448.8365616956.

The spelling of 90420037 in words is "ninety million, four hundred twenty thousand, thirty-seven".