70381491 has 16 divisors (see below), whose sum is σ = 99456000. Its totient is φ = 44147808.

The previous prime is 70381489. The next prime is 70381499. The reversal of 70381491 is 19418307.

It is not a de Polignac number, because 70381491 - 2¹ = 70381489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70381499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4350 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (6216000).

Almost surely, 2^70381491 is an apocalyptic number.

70381491 is a deficient number, since it is larger than the sum of its proper divisors (29074509).

70381491 is a wasteful number, since it uses less digits than its factorization.

70381491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8458.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 70381491 is about 8389.3677354137. The cubic root of 70381491 is about 412.8758565096.

Adding to 70381491 its reverse (19418307), we get a palindrome (89799798).

The spelling of 70381491 in words is "seventy million, three hundred eighty-one thousand, four hundred ninety-one".