70399091 has 32 divisors (see below), whose sum is σ = 89413632. Its totient is φ = 54051840.

The previous prime is 70399081. The next prime is 70399097. The reversal of 70399091 is 19099307.

It is a happy number.

It is not a de Polignac number, because 70399091 - 2¹⁸ = 70136947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70399097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229160 + ... + 229466.

It is an arithmetic number, because the mean of its divisors is an integer number (2794176).

Almost surely, 2^70399091 is an apocalyptic number.

70399091 is a deficient number, since it is larger than the sum of its proper divisors (19014541).

70399091 is a wasteful number, since it uses less digits than its factorization.

70399091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 70399091 is about 8390.4166165930. The cubic root of 70399091 is about 412.9102690108.

The spelling of 70399091 in words is "seventy million, three hundred ninety-nine thousand, ninety-one".