87290401 has 4 divisors (see below), whose sum is σ = 95225904. Its totient is φ = 79354900.

The previous prime is 87290383. The next prime is 87290419. The reversal of 87290401 is 10409278.

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.

It is an interprime number because it is at equal distance from previous prime (87290383) and next prime (87290419).

It is a cyclic number.

It is not a de Polignac number, because 87290401 - 2¹⁷ = 87159329 is a prime.

It is a super-2 number, since 2×87290401² = 15239228213481602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87290431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3967735 + ... + 3967756.

It is an arithmetic number, because the mean of its divisors is an integer number (23806476).

Almost surely, 2^87290401 is an apocalyptic number.

It is an amenable number.

87290401 is a deficient number, since it is larger than the sum of its proper divisors (7935503).

87290401 is a wasteful number, since it uses less digits than its factorization.

87290401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7935502.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 87290401 is about 9342.9332117917. The cubic root of 87290401 is about 443.5972340376.

Adding to 87290401 its reverse (10409278), we get a palindrome (97699679).

The spelling of 87290401 in words is "eighty-seven million, two hundred ninety thousand, four hundred one".